diff --git a/src/helpers.c b/src/helpers.c
index 7c4f0371c..e37865be5 100644
--- a/src/helpers.c
+++ b/src/helpers.c
@@ -519,8 +519,6 @@ void register_tolua_helpers(void)
     at_register(&at_direction);
     at_register(&at_building_action);
 
-  register_function((pf_generic) & lua_building_protection,
-    TOLUA_CAST "lua_building_protection");
   register_function((pf_generic) & lua_building_taxes,
     TOLUA_CAST "lua_building_taxes");
   register_function((pf_generic) & lua_agebuilding,