diff --git a/src/osgDB/ReentrantMutex.cpp b/src/osgDB/ReentrantMutex.cpp
index a98745d54..45d0109e7 100644
--- a/src/osgDB/ReentrantMutex.cpp
+++ b/src/osgDB/ReentrantMutex.cpp
@@ -36,7 +36,7 @@ int ReentrantMutex::lock()
     }
     else
     {
-        int result = /*OpenThreads::*/Mutex::lock();
+        int result = Mutex::lock();
         if (result==0)
         {
             _threadHoldingMutex = OpenThreads::Thread::CurrentThread();