diff --git a/tools/generate-wire.py b/tools/generate-wire.py
index 8b7d075dc..f0a72540f 100755
--- a/tools/generate-wire.py
+++ b/tools/generate-wire.py
@@ -307,7 +307,7 @@ for line in fileinput.input(args[2:]):
 
     if len(parts) == 2:
         # eg commit_sig,132
-        messages[parts[0]] = Message(parts[0],Enumtype("WIRE_" + parts[0].upper(), int(parts[1])),comments)
+        messages[parts[0]] = Message(parts[0],Enumtype("WIRE_" + parts[0].upper(), int(parts[1],0)),comments)
         comments=[]
     else:
         # eg commit_sig,0,channel-id,8