diff --git a/src/osgGA/GUIEventAdapter.cpp b/src/osgGA/GUIEventAdapter.cpp
index ff0a7cad7..e8345a0b9 100644
--- a/src/osgGA/GUIEventAdapter.cpp
+++ b/src/osgGA/GUIEventAdapter.cpp
@@ -37,7 +37,7 @@ GUIEventAdapter::GUIEventAdapter():
 {}
 
 GUIEventAdapter::GUIEventAdapter(const GUIEventAdapter& rhs):
-    Referenced(),
+    osg::Referenced(),
     _eventType(rhs._eventType),
     _time(rhs._time),
     _key(rhs._key),