diff --git a/src/osgViewer/CompositeViewer.cpp b/src/osgViewer/CompositeViewer.cpp
index f86a28b36..d09c4f65c 100644
--- a/src/osgViewer/CompositeViewer.cpp
+++ b/src/osgViewer/CompositeViewer.cpp
@@ -685,7 +685,7 @@ void CompositeViewer::eventTraversal()
 
     if (_views.empty()) return;
 
-    double cutOffTime = _frameStamp->getReferenceTime();
+    double cutOffTime = (_runFrameScheme==ON_DEMAND) ? DBL_MAX : _frameStamp->getReferenceTime();
     
     double beginEventTraversal = osg::Timer::instance()->delta_s(_startTick, osg::Timer::instance()->tick());
 
diff --git a/src/osgViewer/Viewer.cpp b/src/osgViewer/Viewer.cpp
index 16e83ac7f..36b64a3d7 100644
--- a/src/osgViewer/Viewer.cpp
+++ b/src/osgViewer/Viewer.cpp
@@ -613,7 +613,8 @@ void Viewer::eventTraversal()
 {
     if (_done) return;
 
-    double cutOffTime = _frameStamp->getReferenceTime();
+    double cutOffTime = (_runFrameScheme==ON_DEMAND) ? DBL_MAX : _frameStamp->getReferenceTime();
+    
     double beginEventTraversal = osg::Timer::instance()->delta_s(_startTick, osg::Timer::instance()->tick());
 
     // OSG_NOTICE<<"Viewer::frameEventTraversal()."<<std::endl;