diff --git a/src/vim9compile.c b/src/vim9compile.c
index 338fbc6..a70ed5a 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -1406,12 +1406,12 @@
     RETURN_OK_IF_SKIP(cctx);
     if (argcount > regular_args && !has_varargs(ufunc))
     {
-	semsg(_(e_toomanyarg), ufunc->uf_name);
+	semsg(_(e_toomanyarg), printable_func_name(ufunc));
 	return FAIL;
     }
     if (argcount < regular_args - ufunc->uf_def_args.ga_len)
     {
-	semsg(_(e_toofewarg), ufunc->uf_name);
+	semsg(_(e_toofewarg), printable_func_name(ufunc));
 	return FAIL;
     }