1 files changed, 3 insertions, 0 deletions

diff --git a/opcode.pl b/opcode.pl
index 7e8f6ac37c..89d076a57a 100755
--- a/opcode.pl
+++ b/opcode.pl
@@ -652,3 +652,6 @@ getlogin	getlogin		ck_null		st
 # Miscellaneous.
 
 syscall		syscall			ck_fun		imst	S L
+
+# For multi-threading
+lock		lock			ck_null		is	S