diff --git a/crypto/chacha/asm/chacha-armv4.pl b/crypto/chacha/asm/chacha-armv4.pl
index 2a9a7d7..06be3a6 100755
--- a/crypto/chacha/asm/chacha-armv4.pl
+++ b/crypto/chacha/asm/chacha-armv4.pl
@@ -1161,4 +1161,4 @@
 
 	print $_,"\n";
 }
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/chacha/asm/chacha-armv8.pl b/crypto/chacha/asm/chacha-armv8.pl
index 7795f2c..02325e7 100755
--- a/crypto/chacha/asm/chacha-armv8.pl
+++ b/crypto/chacha/asm/chacha-armv8.pl
@@ -1134,4 +1134,4 @@
 
 	print $_,"\n";
 }
-close STDOUT;	# flush
+close STDOUT or die "error closing STDOUT";	# flush
diff --git a/crypto/chacha/asm/chacha-x86.pl b/crypto/chacha/asm/chacha-x86.pl
index 1d6a4e2..ec1cf80 100755
--- a/crypto/chacha/asm/chacha-x86.pl
+++ b/crypto/chacha/asm/chacha-x86.pl
@@ -769,4 +769,4 @@
 
 &asm_finish();
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/chacha/asm/chacha-x86_64.pl b/crypto/chacha/asm/chacha-x86_64.pl
index 6be270e..ab8a1f7 100755
--- a/crypto/chacha/asm/chacha-x86_64.pl
+++ b/crypto/chacha/asm/chacha-x86_64.pl
@@ -2782,4 +2782,4 @@
 	print $_,"\n";
 }
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/cipher_extra/asm/aes128gcmsiv-x86_64.pl b/crypto/cipher_extra/asm/aes128gcmsiv-x86_64.pl
index 1a3d064..54f0b5c 100644
--- a/crypto/cipher_extra/asm/aes128gcmsiv-x86_64.pl
+++ b/crypto/cipher_extra/asm/aes128gcmsiv-x86_64.pl
@@ -2253,4 +2253,4 @@
 
 print $code;
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/cipher_extra/asm/chacha20_poly1305_x86_64.pl b/crypto/cipher_extra/asm/chacha20_poly1305_x86_64.pl
index 0e32279..5b2b977 100644
--- a/crypto/cipher_extra/asm/chacha20_poly1305_x86_64.pl
+++ b/crypto/cipher_extra/asm/chacha20_poly1305_x86_64.pl
@@ -2485,4 +2485,4 @@
 ___
 }
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/aes/asm/aes-586.pl b/crypto/fipsmodule/aes/asm/aes-586.pl
index 25f1813..9b373de 100755
--- a/crypto/fipsmodule/aes/asm/aes-586.pl
+++ b/crypto/fipsmodule/aes/asm/aes-586.pl
@@ -2997,4 +2997,4 @@
 
 &asm_finish();
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/aes/asm/aes-armv4.pl b/crypto/fipsmodule/aes/asm/aes-armv4.pl
index f4ae922..9eebb22 100644
--- a/crypto/fipsmodule/aes/asm/aes-armv4.pl
+++ b/crypto/fipsmodule/aes/asm/aes-armv4.pl
@@ -1247,4 +1247,4 @@
 close SELF;
 
 print $code;
-close STDOUT;	# enforce flush
+close STDOUT or die "error closing STDOUT";	# enforce flush
diff --git a/crypto/fipsmodule/aes/asm/aes-x86_64.pl b/crypto/fipsmodule/aes/asm/aes-x86_64.pl
index ea8b9a4..5b95785 100755
--- a/crypto/fipsmodule/aes/asm/aes-x86_64.pl
+++ b/crypto/fipsmodule/aes/asm/aes-x86_64.pl
@@ -2906,4 +2906,4 @@
 
 print $code;
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/aes/asm/aesni-x86.pl b/crypto/fipsmodule/aes/asm/aesni-x86.pl
index fcb5b98..d57127a 100644
--- a/crypto/fipsmodule/aes/asm/aesni-x86.pl
+++ b/crypto/fipsmodule/aes/asm/aesni-x86.pl
@@ -2551,4 +2551,4 @@
 
 &asm_finish();
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/aes/asm/aesni-x86_64.pl b/crypto/fipsmodule/aes/asm/aesni-x86_64.pl
index b608425..15f6805 100644
--- a/crypto/fipsmodule/aes/asm/aesni-x86_64.pl
+++ b/crypto/fipsmodule/aes/asm/aesni-x86_64.pl
@@ -5108,4 +5108,4 @@
 
 print $code;
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/aes/asm/aesp8-ppc.pl b/crypto/fipsmodule/aes/asm/aesp8-ppc.pl
index 201da1a..7f06720 100644
--- a/crypto/fipsmodule/aes/asm/aesp8-ppc.pl
+++ b/crypto/fipsmodule/aes/asm/aesp8-ppc.pl
@@ -3802,4 +3802,4 @@
         print $_,"\n";
 }
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/aes/asm/aesv8-armx.pl b/crypto/fipsmodule/aes/asm/aesv8-armx.pl
index 13f86a0..187c221 100644
--- a/crypto/fipsmodule/aes/asm/aesv8-armx.pl
+++ b/crypto/fipsmodule/aes/asm/aesv8-armx.pl
@@ -1018,4 +1018,4 @@
     }
 }
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/aes/asm/bsaes-armv7.pl b/crypto/fipsmodule/aes/asm/bsaes-armv7.pl
index d4db3b4..932b3b6 100644
--- a/crypto/fipsmodule/aes/asm/bsaes-armv7.pl
+++ b/crypto/fipsmodule/aes/asm/bsaes-armv7.pl
@@ -2431,4 +2431,4 @@
 
 print $code;
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/aes/asm/vpaes-armv8.pl b/crypto/fipsmodule/aes/asm/vpaes-armv8.pl
index 5fa06d8..bae5e7e 100755
--- a/crypto/fipsmodule/aes/asm/vpaes-armv8.pl
+++ b/crypto/fipsmodule/aes/asm/vpaes-armv8.pl
@@ -1359,4 +1359,4 @@
 
 print $code;
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/aes/asm/vpaes-x86.pl b/crypto/fipsmodule/aes/asm/vpaes-x86.pl
index 81e7e84..2b40362 100644
--- a/crypto/fipsmodule/aes/asm/vpaes-x86.pl
+++ b/crypto/fipsmodule/aes/asm/vpaes-x86.pl
@@ -920,4 +920,4 @@
 
 &asm_finish();
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/aes/asm/vpaes-x86_64.pl b/crypto/fipsmodule/aes/asm/vpaes-x86_64.pl
index 9429344..45463e8 100644
--- a/crypto/fipsmodule/aes/asm/vpaes-x86_64.pl
+++ b/crypto/fipsmodule/aes/asm/vpaes-x86_64.pl
@@ -1550,4 +1550,4 @@
 
 print $code;
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/bn/asm/armv4-mont.pl b/crypto/fipsmodule/bn/asm/armv4-mont.pl
index 2ee389e..f3aa4be 100644
--- a/crypto/fipsmodule/bn/asm/armv4-mont.pl
+++ b/crypto/fipsmodule/bn/asm/armv4-mont.pl
@@ -759,4 +759,4 @@
 	print $_,"\n";
 }
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/bn/asm/armv8-mont.pl b/crypto/fipsmodule/bn/asm/armv8-mont.pl
index aab9eaa..db2ba49 100644
--- a/crypto/fipsmodule/bn/asm/armv8-mont.pl
+++ b/crypto/fipsmodule/bn/asm/armv8-mont.pl
@@ -1507,4 +1507,4 @@
 
 print $code;
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/bn/asm/bn-586.pl b/crypto/fipsmodule/bn/asm/bn-586.pl
index 16818d5..05ef28c 100644
--- a/crypto/fipsmodule/bn/asm/bn-586.pl
+++ b/crypto/fipsmodule/bn/asm/bn-586.pl
@@ -31,7 +31,7 @@
 
 &asm_finish();
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
 
 sub bn_mul_add_words
 	{
diff --git a/crypto/fipsmodule/bn/asm/co-586.pl b/crypto/fipsmodule/bn/asm/co-586.pl
index 5eeeef9..abe328a 100644
--- a/crypto/fipsmodule/bn/asm/co-586.pl
+++ b/crypto/fipsmodule/bn/asm/co-586.pl
@@ -22,7 +22,7 @@
 
 &asm_finish();
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
 
 sub mul_add_c
 	{
diff --git a/crypto/fipsmodule/bn/asm/rsaz-avx2.pl b/crypto/fipsmodule/bn/asm/rsaz-avx2.pl
index 51feb69..a0da239 100755
--- a/crypto/fipsmodule/bn/asm/rsaz-avx2.pl
+++ b/crypto/fipsmodule/bn/asm/rsaz-avx2.pl
@@ -1940,4 +1940,4 @@
 ___
 }}}
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/bn/asm/x86-mont.pl b/crypto/fipsmodule/bn/asm/x86-mont.pl
index 214f2b0..1f61ae5 100755
--- a/crypto/fipsmodule/bn/asm/x86-mont.pl
+++ b/crypto/fipsmodule/bn/asm/x86-mont.pl
@@ -628,4 +628,4 @@
 
 &asm_finish();
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/bn/asm/x86_64-mont.pl b/crypto/fipsmodule/bn/asm/x86_64-mont.pl
index 3d98e72..0a9e4d1 100755
--- a/crypto/fipsmodule/bn/asm/x86_64-mont.pl
+++ b/crypto/fipsmodule/bn/asm/x86_64-mont.pl
@@ -1578,4 +1578,4 @@
 }
 
 print $code;
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/bn/asm/x86_64-mont5.pl b/crypto/fipsmodule/bn/asm/x86_64-mont5.pl
index abcfe6a..b2ff114 100755
--- a/crypto/fipsmodule/bn/asm/x86_64-mont5.pl
+++ b/crypto/fipsmodule/bn/asm/x86_64-mont5.pl
@@ -3930,4 +3930,4 @@
 $code =~ s/\`([^\`]*)\`/eval($1)/gem;
 
 print $code;
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/ec/asm/p256-x86_64-asm.pl b/crypto/fipsmodule/ec/asm/p256-x86_64-asm.pl
index 5402885..6a021db 100755
--- a/crypto/fipsmodule/ec/asm/p256-x86_64-asm.pl
+++ b/crypto/fipsmodule/ec/asm/p256-x86_64-asm.pl
@@ -4146,4 +4146,4 @@
 
 $code =~ s/\`([^\`]*)\`/eval $1/gem;
 print $code;
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/ec/asm/p256_beeu-x86_64-asm.pl b/crypto/fipsmodule/ec/asm/p256_beeu-x86_64-asm.pl
index 0bb6547..c05abba 100644
--- a/crypto/fipsmodule/ec/asm/p256_beeu-x86_64-asm.pl
+++ b/crypto/fipsmodule/ec/asm/p256_beeu-x86_64-asm.pl
@@ -400,4 +400,4 @@
 ___
 
 print $code;
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/md5/asm/md5-586.pl b/crypto/fipsmodule/md5/asm/md5-586.pl
index ded9442..20c226b 100644
--- a/crypto/fipsmodule/md5/asm/md5-586.pl
+++ b/crypto/fipsmodule/md5/asm/md5-586.pl
@@ -36,7 +36,7 @@
 &md5_block("md5_block_asm_data_order");
 &asm_finish();
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
 
 sub Np
 	{
diff --git a/crypto/fipsmodule/md5/asm/md5-x86_64.pl b/crypto/fipsmodule/md5/asm/md5-x86_64.pl
index 6eb33c0..509bcde 100644
--- a/crypto/fipsmodule/md5/asm/md5-x86_64.pl
+++ b/crypto/fipsmodule/md5/asm/md5-x86_64.pl
@@ -380,4 +380,4 @@
 
 print $code;
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/modes/asm/aesni-gcm-x86_64.pl b/crypto/fipsmodule/modes/asm/aesni-gcm-x86_64.pl
index b9edb79..d3e3763 100644
--- a/crypto/fipsmodule/modes/asm/aesni-gcm-x86_64.pl
+++ b/crypto/fipsmodule/modes/asm/aesni-gcm-x86_64.pl
@@ -1143,4 +1143,4 @@
 
 print $code;
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/modes/asm/ghash-armv4.pl b/crypto/fipsmodule/modes/asm/ghash-armv4.pl
index 778b543..54c80f7 100644
--- a/crypto/fipsmodule/modes/asm/ghash-armv4.pl
+++ b/crypto/fipsmodule/modes/asm/ghash-armv4.pl
@@ -553,4 +553,4 @@
 
 	print $_,"\n";
 }
-close STDOUT; # enforce flush
+close STDOUT or die "error closing STDOUT"; # enforce flush
diff --git a/crypto/fipsmodule/modes/asm/ghash-neon-armv8.pl b/crypto/fipsmodule/modes/asm/ghash-neon-armv8.pl
index 972be41..f57017d 100644
--- a/crypto/fipsmodule/modes/asm/ghash-neon-armv8.pl
+++ b/crypto/fipsmodule/modes/asm/ghash-neon-armv8.pl
@@ -284,4 +284,4 @@
 
 	print $_,"\n";
 }
-close STDOUT; # enforce flush
+close STDOUT or die "error closing STDOUT"; # enforce flush
diff --git a/crypto/fipsmodule/modes/asm/ghash-ssse3-x86.pl b/crypto/fipsmodule/modes/asm/ghash-ssse3-x86.pl
index 0d9ce15..45e1ee1 100644
--- a/crypto/fipsmodule/modes/asm/ghash-ssse3-x86.pl
+++ b/crypto/fipsmodule/modes/asm/ghash-ssse3-x86.pl
@@ -285,4 +285,4 @@
 
 &asm_finish();
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/modes/asm/ghash-ssse3-x86_64.pl b/crypto/fipsmodule/modes/asm/ghash-ssse3-x86_64.pl
index 1dd2519..e0e5010 100644
--- a/crypto/fipsmodule/modes/asm/ghash-ssse3-x86_64.pl
+++ b/crypto/fipsmodule/modes/asm/ghash-ssse3-x86_64.pl
@@ -410,4 +410,4 @@
 }
 
 print $code;
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/modes/asm/ghash-x86.pl b/crypto/fipsmodule/modes/asm/ghash-x86.pl
index 02edf03..a2ab859 100644
--- a/crypto/fipsmodule/modes/asm/ghash-x86.pl
+++ b/crypto/fipsmodule/modes/asm/ghash-x86.pl
@@ -1150,7 +1150,7 @@
 &asciz("GHASH for x86, CRYPTOGAMS by <appro\@openssl.org>");
 &asm_finish();
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
 
 # A question was risen about choice of vanilla MMX. Or rather why wasn't
 # SSE2 chosen instead? In addition to the fact that MMX runs on legacy
diff --git a/crypto/fipsmodule/modes/asm/ghash-x86_64.pl b/crypto/fipsmodule/modes/asm/ghash-x86_64.pl
index b267698..5c4122f 100644
--- a/crypto/fipsmodule/modes/asm/ghash-x86_64.pl
+++ b/crypto/fipsmodule/modes/asm/ghash-x86_64.pl
@@ -1803,4 +1803,4 @@
 
 print $code;
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/modes/asm/ghashp8-ppc.pl b/crypto/fipsmodule/modes/asm/ghashp8-ppc.pl
index c46cdb5..7a1259b 100644
--- a/crypto/fipsmodule/modes/asm/ghashp8-ppc.pl
+++ b/crypto/fipsmodule/modes/asm/ghashp8-ppc.pl
@@ -667,4 +667,4 @@
 	print $_,"\n";
 }
 
-close STDOUT; # enforce flush
+close STDOUT or die "error closing STDOUT"; # enforce flush
diff --git a/crypto/fipsmodule/modes/asm/ghashv8-armx.pl b/crypto/fipsmodule/modes/asm/ghashv8-armx.pl
index 1435db5..99124a2 100644
--- a/crypto/fipsmodule/modes/asm/ghashv8-armx.pl
+++ b/crypto/fipsmodule/modes/asm/ghashv8-armx.pl
@@ -425,4 +425,4 @@
     }
 }
 
-close STDOUT; # enforce flush
+close STDOUT or die "error closing STDOUT"; # enforce flush
diff --git a/crypto/fipsmodule/rand/asm/rdrand-x86_64.pl b/crypto/fipsmodule/rand/asm/rdrand-x86_64.pl
index 76b5f9b..eb2a592 100644
--- a/crypto/fipsmodule/rand/asm/rdrand-x86_64.pl
+++ b/crypto/fipsmodule/rand/asm/rdrand-x86_64.pl
@@ -84,4 +84,4 @@
 .size CRYPTO_rdrand_multiple8_buf,.-CRYPTO_rdrand_multiple8_buf
 ___
 
-close STDOUT;	# flush
+close STDOUT or die "error closing STDOUT";	# flush
diff --git a/crypto/fipsmodule/sha/asm/sha1-586.pl b/crypto/fipsmodule/sha/asm/sha1-586.pl
index 87fd361..bf42961 100644
--- a/crypto/fipsmodule/sha/asm/sha1-586.pl
+++ b/crypto/fipsmodule/sha/asm/sha1-586.pl
@@ -1483,4 +1483,4 @@
 
 &asm_finish();
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/sha/asm/sha1-armv4-large.pl b/crypto/fipsmodule/sha/asm/sha1-armv4-large.pl
index 27187dd..ca82514 100644
--- a/crypto/fipsmodule/sha/asm/sha1-armv4-large.pl
+++ b/crypto/fipsmodule/sha/asm/sha1-armv4-large.pl
@@ -740,4 +740,4 @@
 	print $_,$/;
 }
 
-close STDOUT; # enforce flush
+close STDOUT or die "error closing STDOUT"; # enforce flush
diff --git a/crypto/fipsmodule/sha/asm/sha1-armv8.pl b/crypto/fipsmodule/sha/asm/sha1-armv8.pl
index 7c8880f..c147462 100644
--- a/crypto/fipsmodule/sha/asm/sha1-armv8.pl
+++ b/crypto/fipsmodule/sha/asm/sha1-armv8.pl
@@ -353,4 +353,4 @@
 	print $_,"\n";
 }
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/sha/asm/sha1-x86_64.pl b/crypto/fipsmodule/sha/asm/sha1-x86_64.pl
index fd4ff2a..df7cbc3 100755
--- a/crypto/fipsmodule/sha/asm/sha1-x86_64.pl
+++ b/crypto/fipsmodule/sha/asm/sha1-x86_64.pl
@@ -2122,4 +2122,4 @@
 
 	print $_,"\n";
 }
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/sha/asm/sha256-586.pl b/crypto/fipsmodule/sha/asm/sha256-586.pl
index 129a9f4..240a604 100644
--- a/crypto/fipsmodule/sha/asm/sha256-586.pl
+++ b/crypto/fipsmodule/sha/asm/sha256-586.pl
@@ -1287,4 +1287,4 @@
 
 &asm_finish();
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/sha/asm/sha256-armv4.pl b/crypto/fipsmodule/sha/asm/sha256-armv4.pl
index e5ecdfd..15d78de 100644
--- a/crypto/fipsmodule/sha/asm/sha256-armv4.pl
+++ b/crypto/fipsmodule/sha/asm/sha256-armv4.pl
@@ -735,4 +735,4 @@
 	print $_,"\n";
 }
 
-close STDOUT; # enforce flush
+close STDOUT or die "error closing STDOUT"; # enforce flush
diff --git a/crypto/fipsmodule/sha/asm/sha512-586.pl b/crypto/fipsmodule/sha/asm/sha512-586.pl
index 25a5f25..01acf67 100644
--- a/crypto/fipsmodule/sha/asm/sha512-586.pl
+++ b/crypto/fipsmodule/sha/asm/sha512-586.pl
@@ -922,4 +922,4 @@
 
 &asm_finish();
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/sha/asm/sha512-armv4.pl b/crypto/fipsmodule/sha/asm/sha512-armv4.pl
index cc247a4..c8c715e 100644
--- a/crypto/fipsmodule/sha/asm/sha512-armv4.pl
+++ b/crypto/fipsmodule/sha/asm/sha512-armv4.pl
@@ -670,4 +670,4 @@
 close SELF;
 
 print $code;
-close STDOUT; # enforce flush
+close STDOUT or die "error closing STDOUT"; # enforce flush
diff --git a/crypto/fipsmodule/sha/asm/sha512-armv8.pl b/crypto/fipsmodule/sha/asm/sha512-armv8.pl
index 3f69071..64306be 100644
--- a/crypto/fipsmodule/sha/asm/sha512-armv8.pl
+++ b/crypto/fipsmodule/sha/asm/sha512-armv8.pl
@@ -457,4 +457,4 @@
 	print $_,"\n";
 }
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/fipsmodule/sha/asm/sha512-x86_64.pl b/crypto/fipsmodule/sha/asm/sha512-x86_64.pl
index 4927850..ca827a6 100755
--- a/crypto/fipsmodule/sha/asm/sha512-x86_64.pl
+++ b/crypto/fipsmodule/sha/asm/sha512-x86_64.pl
@@ -2083,4 +2083,4 @@
 
 	print $_,"\n";
 }
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/test/asm/trampoline-armv4.pl b/crypto/test/asm/trampoline-armv4.pl
index 30f510e..6118dd7 100755
--- a/crypto/test/asm/trampoline-armv4.pl
+++ b/crypto/test/asm/trampoline-armv4.pl
@@ -179,4 +179,4 @@
 }
 
 print $code;
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/test/asm/trampoline-armv8.pl b/crypto/test/asm/trampoline-armv8.pl
index aab5250..410b59e 100755
--- a/crypto/test/asm/trampoline-armv8.pl
+++ b/crypto/test/asm/trampoline-armv8.pl
@@ -206,4 +206,4 @@
 }
 
 print $code;
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/test/asm/trampoline-x86.pl b/crypto/test/asm/trampoline-x86.pl
index 569a3dd..4244ac2 100755
--- a/crypto/test/asm/trampoline-x86.pl
+++ b/crypto/test/asm/trampoline-x86.pl
@@ -120,4 +120,4 @@
 
 &asm_finish();
 
-close STDOUT;
+close STDOUT or die "error closing STDOUT";
diff --git a/crypto/test/asm/trampoline-x86_64.pl b/crypto/test/asm/trampoline-x86_64.pl
index 8cb1410..5196141 100755
--- a/crypto/test/asm/trampoline-x86_64.pl
+++ b/crypto/test/asm/trampoline-x86_64.pl
@@ -556,4 +556,4 @@
 }
 
 print $code;
-close STDOUT;
+close STDOUT or die "error closing STDOUT";