x86_64-gf2m.pl: fix typo.
diff --git a/crypto/bn/asm/x86_64-gf2m.pl b/crypto/bn/asm/x86_64-gf2m.pl
index bbc66ed..226c66c 100644
--- a/crypto/bn/asm/x86_64-gf2m.pl
+++ b/crypto/bn/asm/x86_64-gf2m.pl
@@ -32,7 +32,7 @@
 die "can't locate x86_64-xlate.pl";
 
 open OUT,"| \"$^X\" $xlate $flavour $output";
-STDOUT=*OUT;
+*STDOUT=*OUT;
 
 ($lo,$hi)=("%rax","%rdx");	$a=$lo;
 ($i0,$i1)=("%rsi","%rdi");