diff --git a/src/errors.h b/src/errors.h
index ed267fd..921b9df 100644
--- a/src/errors.h
+++ b/src/errors.h
@@ -355,3 +355,5 @@
 	INIT(= N_("E1158: Cannot use flatten() in Vim9 script"));
 EXTERN char e_cannot_split_window_when_closing_buffer[]
 	INIT(= N_("E1159: Cannot split a window when closing the buffer"));
+EXTERN char e_cannot_use_default_for_variable_arguments[]
+	INIT(= N_("E1160: Cannot use a default for variable arguments"));