diff --git a/gcc/cp/parser.cc b/gcc/cp/parser.cc
index 4685a9ab80f..89d2b9e692f 100644
--- a/gcc/cp/parser.cc
+++ b/gcc/cp/parser.cc
@@ -34241,7 +34241,7 @@ cp_parser_lookup_name (cp_parser *parser, tree name,
 	   parse, those errors are valid.  */
 	decl = lookup_member (object_type,
 			      name,
-			      /*protect=*/0,
+			      /*protect=*/2,
 			      /*prefer_type=*/tag_type != none_type,
 			      tf_warning_or_error);
       else
diff --git a/gcc/testsuite/g++.dg/tc1/dr176-2.C b/gcc/testsuite/g++.dg/tc1/dr176-2.C
new file mode 100644
index 00000000000..b639aaf0c16
--- /dev/null
+++ b/gcc/testsuite/g++.dg/tc1/dr176-2.C
@@ -0,0 +1,13 @@
+// { dg-do compile }
+// PR c++/122509
+
+namespace s {
+  template<class A>
+  struct v {
+    void size() {}
+  };
+}
+struct D : public s::v<double>, public s::v<int> {};
+int main() {
+  D().v<int>::size();
+}