diff --git a/src/autocmd.c b/src/autocmd.c
index 94bd49a..4831ea8 100644
--- a/src/autocmd.c
+++ b/src/autocmd.c
@@ -580,7 +580,7 @@
     if (del_group)
     {
 	if (*arg == NUL)
-	    emsg(_(e_argreq));
+	    emsg(_(e_argument_required));
 	else
 	    au_del_group(arg);
     }