diff --git a/third_party/sike/asm/fp-x86_64.pl b/third_party/sike/asm/fp-x86_64.pl
index ced9b09d..d2a975a4 100755
--- a/third_party/sike/asm/fp-x86_64.pl
+++ b/third_party/sike/asm/fp-x86_64.pl
@@ -668,7 +668,7 @@ ${PREFIX}_mpdblsubx2_asm:
 #  (one level), schoolbook (one level)
 .mul_mulx_asm:
 .cfi_startproc
-    // sike_mpmul has already pushed r12--15 by this point..cfi_adjust_cfa_offset 32
+    # sike_mpmul has already pushed r12--15 by this point..cfi_adjust_cfa_offset 32
 .cfi_adjust_cfa_offset 32
 .cfi_offset r12, -16
 .cfi_offset r13, -24
@@ -841,8 +841,9 @@ $code.=<<___ if ($addx);
 .cfi_adjust_cfa_offset -8
 .cfi_same_value r12
     ret
+___
 
-
+$code.=<<___;
 ###########################################
 #  Integer multiplication
 #  Based on Karatsuba method