diff --git a/googletest/include/gtest/internal/gtest-port.h b/googletest/include/gtest/internal/gtest-port.h
index fa457b788..ef61ec23a 100644
--- a/googletest/include/gtest/internal/gtest-port.h
+++ b/googletest/include/gtest/internal/gtest-port.h
@@ -1684,8 +1684,8 @@ class MutexBase {
   // Does nothing if the current thread holds the mutex. Otherwise, crashes
   // with high probability.
   void AssertHeld() const {
-    GTEST_CHECK_(has_owner_ && pthread_equal(owner_, pthread_self()))
-        << "The current thread is not holding the mutex @" << this;
+    GTEST_CHECK_(has_owner_)
+        << "No thread is holding the mutex @" << this;
   }
 
   // A static mutex may be used before main() is entered.  It may even