diff --git a/crypto/bn/asm/x86_64-gf2m.pl b/crypto/bn/asm/x86_64-gf2m.pl
index a30d4ef02958fc900504fc555f998b26dc67fb06..bbc66ed3cf2497928b3b569587673c96c7fc1e01 100644
--- a/crypto/bn/asm/x86_64-gf2m.pl
+++ b/crypto/bn/asm/x86_64-gf2m.pl
@@ -31,7 +31,8 @@ $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
 ( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
 die "can't locate x86_64-xlate.pl";
 
-open STDOUT,"| \"$^X\" $xlate $flavour $output";
+open OUT,"| \"$^X\" $xlate $flavour $output";
+STDOUT=*OUT;
 
 ($lo,$hi)=("%rax","%rdx");	$a=$lo;
 ($i0,$i1)=("%rsi","%rdi");