Index: compile_rules_graph.py
==================================================================
--- compile_rules_graph.py
+++ compile_rules_graph.py
@@ -306,11 +306,11 @@
     elif cAction == "%" or cAction == "/":
         ## tags
         return [sOption, sCondition, cAction, sAction, iStartAction, iEndAction]
     elif cAction == "=":
         ## disambiguator
-        if "define(" in sAction and not re.search(r"define\(\\\d+ *, *\[.*\] *\)", sAction):
+        if "define(" in sAction and not re.search(r"define\(\\-?\d+ *, *\[.*\] *\)", sAction):
             print("# Error in action at line " + sActionId + ": second argument for <define> must be a list of strings")
         sAction = createFunction("da", sActionId, sAction)
         return [sOption, sCondition, cAction, sAction]
     else:
         print(" # Unknown action.", sActionId)