diff --git a/crypto/mem.c b/crypto/mem.c
index edd14a8..df8e0e3 100644
--- a/crypto/mem.c
+++ b/crypto/mem.c
@@ -104,9 +104,9 @@
 
 void OPENSSL_cleanse(void *ptr, size_t len) {
 #if defined(OPENSSL_WINDOWS)
-	SecureZeroMemory(ptr, len);
+  SecureZeroMemory(ptr, len);
 #else
-	memset(ptr, 0, len);
+  memset(ptr, 0, len);
 
 #if !defined(OPENSSL_NO_ASM)
   /* As best as we can tell, this is sufficient to break any optimisations that