diff --git a/crypto/fipsmodule/bn/asm/rsaz-avx2.pl b/crypto/fipsmodule/bn/asm/rsaz-avx2.pl
index ab063d7..72aa2a3 100755
--- a/crypto/fipsmodule/bn/asm/rsaz-avx2.pl
+++ b/crypto/fipsmodule/bn/asm/rsaz-avx2.pl
@@ -51,10 +51,8 @@
 # In upstream, this is controlled by shelling out to the compiler to check
 # versions, but BoringSSL is intended to be used with pre-generated perlasm
 # output, so this isn't useful anyway.
-#
-# TODO(davidben): Set $addx to one once build problems are resolved.
 $avx = 2;
-$addx = 0;
+$addx = 1;
 
 open OUT,"| \"$^X\" \"$xlate\" $flavour \"$output\"";
 *STDOUT = *OUT;
diff --git a/crypto/fipsmodule/bn/asm/x86_64-mont.pl b/crypto/fipsmodule/bn/asm/x86_64-mont.pl
index 0dd1d8b..023143a 100755
--- a/crypto/fipsmodule/bn/asm/x86_64-mont.pl
+++ b/crypto/fipsmodule/bn/asm/x86_64-mont.pl
@@ -63,9 +63,7 @@
 # In upstream, this is controlled by shelling out to the compiler to check
 # versions, but BoringSSL is intended to be used with pre-generated perlasm
 # output, so this isn't useful anyway.
-#
-# TODO(davidben): Set $addx to one once build problems are resolved.
-$addx = 0;
+$addx = 1;
 
 # int bn_mul_mont(
 $rp="%rdi";	# BN_ULONG *rp,
diff --git a/crypto/fipsmodule/bn/asm/x86_64-mont5.pl b/crypto/fipsmodule/bn/asm/x86_64-mont5.pl
index 700df17..e3dcdef 100755
--- a/crypto/fipsmodule/bn/asm/x86_64-mont5.pl
+++ b/crypto/fipsmodule/bn/asm/x86_64-mont5.pl
@@ -48,9 +48,7 @@
 # In upstream, this is controlled by shelling out to the compiler to check
 # versions, but BoringSSL is intended to be used with pre-generated perlasm
 # output, so this isn't useful anyway.
-#
-# TODO(davidben): Set $addx to one once build problems are resolved.
-$addx = 0;
+$addx = 1;
 
 # int bn_mul_mont_gather5(
 $rp="%rdi";	# BN_ULONG *rp,
diff --git a/crypto/fipsmodule/ec/asm/p256-x86_64-asm.pl b/crypto/fipsmodule/ec/asm/p256-x86_64-asm.pl
index c2f67f4..1dc257d 100755
--- a/crypto/fipsmodule/ec/asm/p256-x86_64-asm.pl
+++ b/crypto/fipsmodule/ec/asm/p256-x86_64-asm.pl
@@ -54,9 +54,8 @@
 open OUT,"| \"$^X\" \"$xlate\" $flavour \"$output\"";
 *STDOUT=*OUT;
 
-# TODO(davidben): Set $addx to one once build problems are resolved.
 $avx = 2;
-$addx = 0;
+$addx = 1;
 
 $code.=<<___;
 .text