diff --git a/googlemock/test/gmock-matchers_test.cc b/googlemock/test/gmock-matchers_test.cc
index d97889e1..f0e42f59 100644
--- a/googlemock/test/gmock-matchers_test.cc
+++ b/googlemock/test/gmock-matchers_test.cc
@@ -157,6 +157,9 @@ using testing::internal::RE;
 using testing::internal::scoped_ptr;
 using testing::internal::StreamMatchResultListener;
 using testing::internal::Strings;
+using testing::internal::linked_ptr;
+using testing::internal::scoped_ptr;
+using testing::internal::string;
 using testing::make_tuple;
 using testing::tuple;