diff --git a/gcc/config/arc/arc.cc b/gcc/config/arc/arc.cc
index 179f11f7077..686de0ff2d5 100644
--- a/gcc/config/arc/arc.cc
+++ b/gcc/config/arc/arc.cc
@@ -2352,7 +2352,8 @@ arc_setup_incoming_varargs (cumulative_args_t args_so_far,
   /* We must treat `__builtin_va_alist' as an anonymous arg.  */
 
   next_cum = *get_cumulative_args (args_so_far);
-  if (!TYPE_NO_NAMED_ARGS_STDARG_P (TREE_TYPE (current_function_decl)))
+  if (!TYPE_NO_NAMED_ARGS_STDARG_P (TREE_TYPE (current_function_decl))
+      || arg.type != NULL_TREE)
     arc_function_arg_advance (pack_cumulative_args (&next_cum), arg);
   first_anon_arg = next_cum;