diff --git a/include/osgDB/Registry b/include/osgDB/Registry
index 2829ca61d..2b317ea91 100644
--- a/include/osgDB/Registry
+++ b/include/osgDB/Registry
@@ -50,7 +50,8 @@ namespace osgDB {
     The RegisterReaderWriterProxy can be used to automatically
     register at runtime a reader/writer with the Registry.
 */
-class OSGDB_EXPORT Registry : public osg::Referenced
+class OSGDB_EXPORT Registry : osg::depends_on<OpenThreads::Mutex*, osg::Referenced::getGlobalReferencedMutex>,
+                              public osg::Referenced
 {
     public: