diff --git a/src/errors.h b/src/errors.h
index 99247b6..0f54eba 100644
--- a/src/errors.h
+++ b/src/errors.h
@@ -3339,3 +3339,5 @@
 EXTERN char e_cannot_change_menus_while_listing[]
 	INIT(= N_("E1310: Cannot change menus while listing"));
 #endif
+EXTERN char e_cannot_change_user_commands_while_listing[]
+	INIT(= N_("E1311: Cannot change user commands while listing"));