diff --git a/res/gamedata/scripts/lua_help.script b/res/gamedata/scripts/lua_help.script
index ea60cac6e77..32012e45d09 100644
--- a/res/gamedata/scripts/lua_help.script
+++ b/res/gamedata/scripts/lua_help.script
@@ -7715,7 +7715,7 @@ C++ class game_object {
 
     function direction() const;
 
-    function kill(game_object*);
+    function kill(game_object*, boolean);
 
     function cost() const;