diff --git a/src/errors.h b/src/errors.h
index bfbe029..09679b2 100644
--- a/src/errors.h
+++ b/src/errors.h
@@ -500,3 +500,5 @@
 	INIT(= N_("E1208: -complete used without -nargs"));
 EXTERN char e_invalid_value_for_line_number_str[]
 	INIT(= N_("E1209: Invalid value for a line number: \"%s\""));
+EXTERN char e_number_required_for_argument_nr[]
+	INIT(= N_("E1210: Number required for argument %d"));