diff --git a/crypto/sha/asm/sha1-ia64.pl b/crypto/sha/asm/sha1-ia64.pl
index aa18c1089..51c4f47ec 100644
--- a/crypto/sha/asm/sha1-ia64.pl
+++ b/crypto/sha/asm/sha1-ia64.pl
@@ -302,4 +302,5 @@ $code.=<<___;
 stringz	"SHA1 block transform for IA64, CRYPTOGAMS by <appro\@openssl.org>"
 ___
 
+$output=shift and open STDOUT,">$output";
 print $code;