diff --git a/include/osg/CullSettings b/include/osg/CullSettings
index 05dd39541..bfe1da58d 100644
--- a/include/osg/CullSettings
+++ b/include/osg/CullSettings
@@ -14,6 +14,7 @@
 #ifndef OSG_CULLSETTINGS
 #define OSG_CULLSETTINGS 1
 
+#include <iosfwd>
 #include <osg/Matrix>
 #include <osg/ClearNode>
 
diff --git a/src/osg/OcclusionQueryNode.cpp b/src/osg/OcclusionQueryNode.cpp
index 12f1201ba..38b0c0066 100644
--- a/src/osg/OcclusionQueryNode.cpp
+++ b/src/osg/OcclusionQueryNode.cpp
@@ -383,7 +383,7 @@ QueryGeometry::drawImplementation( osg::RenderInfo& renderInfo ) const
         "oagOQ: QG: Querying for: " << _oqnName << std::endl;
 
     ext->glBeginQuery( GL_SAMPLES_PASSED_ARB, tr->_id );
-    Geometry::drawImplementation( renderInfo );
+    osg::Geometry::drawImplementation( renderInfo );
     ext->glEndQuery( GL_SAMPLES_PASSED_ARB );
     tr->_active = true;
 
diff --git a/src/osgUtil/IntersectionVisitor.cpp b/src/osgUtil/IntersectionVisitor.cpp
index c83076bd1..61ef0387e 100644
--- a/src/osgUtil/IntersectionVisitor.cpp
+++ b/src/osgUtil/IntersectionVisitor.cpp
@@ -153,7 +153,7 @@ bool IntersectorGroup::containsIntersections()
 IntersectionVisitor::IntersectionVisitor(Intersector* intersector, ReadCallback* readCallback)
 {
     // override the default node visitor mode.
-    setTraversalMode(NodeVisitor::TRAVERSE_ACTIVE_CHILDREN);
+    setTraversalMode(osg::NodeVisitor::TRAVERSE_ACTIVE_CHILDREN);
     
     setIntersector(intersector);