diff --git a/src/osgWidget/PdfReader.cpp b/src/osgWidget/PdfReader.cpp
index 9f928c84c..b1a7661ba 100644
--- a/src/osgWidget/PdfReader.cpp
+++ b/src/osgWidget/PdfReader.cpp
@@ -66,7 +66,10 @@ bool PdfReader::assign(PdfImage* pdfImage, const GeometryHints& hints)
                 texture,
                 osg::StateAttribute::ON);
 
-    pictureQuad->setEventCallback(new osgViewer::InteractiveImageHandler(_pdfImage.get()));
+    osg::ref_ptr<osgViewer::InteractiveImageHandler> iih = new osgViewer::InteractiveImageHandler(_pdfImage.get());
+    
+    pictureQuad->setEventCallback(iih.get());
+    pictureQuad->setCullCallback(iih.get());
 
     addDrawable(pictureQuad);
 
diff --git a/src/osgWidget/VncClient.cpp b/src/osgWidget/VncClient.cpp
index 2032c07ae..116da8a85 100644
--- a/src/osgWidget/VncClient.cpp
+++ b/src/osgWidget/VncClient.cpp
@@ -61,7 +61,10 @@ bool VncClient::assign(VncImage* vncImage, const GeometryHints& hints)
                 texture,
                 osg::StateAttribute::ON);
 
-    pictureQuad->setEventCallback(new osgViewer::InteractiveImageHandler(_vncImage.get()));
+    osg::ref_ptr<osgViewer::InteractiveImageHandler> iih = new osgViewer::InteractiveImageHandler(_vncImage.get());
+    
+    pictureQuad->setEventCallback(iih.get());
+    pictureQuad->setCullCallback(iih.get());
 
     addDrawable(pictureQuad);