1 files changed, 3 insertions, 0 deletions
diff --git a/googletest/src/gtest.cc b/googletest/src/gtest.cc
index afd7d1b..332b3e9 100644
--- a/googletest/src/gtest.cc
+++ b/googletest/src/gtest.cc
@@ -423,6 +423,9 @@ void AssertHelper::operator=(const Message& message) const {
                       );  // NOLINT
 }
 
+// Mutex for linked pointers.
+GTEST_API_ GTEST_DEFINE_STATIC_MUTEX_(g_linked_ptr_mutex);
+
 // A copy of all command line arguments.  Set by InitGoogleTest().
 static ::std::vector<std::string> g_argvs;