1 files changed, 1 insertions, 0 deletions

diff --git a/src/lib/libcrypto/perlasm/x86masm.pl b/src/lib/libcrypto/perlasm/x86masm.pl
index 96b1b73e1a..f937d07c87 100644
--- a/src/lib/libcrypto/perlasm/x86masm.pl
+++ b/src/lib/libcrypto/perlasm/x86masm.pl
@@ -33,6 +33,7 @@ sub ::generic
 sub ::call      { &::emit("call",(&::islabel($_[0]) or "$nmdecor$_[0]")); }
 sub ::call_ptr  { &::emit("call",@_);   }
 sub ::jmp_ptr   { &::emit("jmp",@_);    }
+sub ::lock      { &::data_byte(0xf0);   }
 
 sub get_mem
 { my($size,$addr,$reg1,$reg2,$idx)=@_;