diff --git a/include/osgUtil/CullVisitor b/include/osgUtil/CullVisitor
index 68c1ef910..80f16e36c 100644
--- a/include/osgUtil/CullVisitor
+++ b/include/osgUtil/CullVisitor
@@ -214,7 +214,8 @@ class OSGUTIL_EXPORT CullVisitor : public osg::NodeVisitor, public osg::CullStac
         /** reimplement CullStack's popProjectionMatrix() adding clamping of the projection matrix to the computed near and far.*/
         virtual void popProjectionMatrix();
         
-        bool clampProjectionMatrix(osg::Matrix& projection, value_type& znear, value_type& zfar) const;
+        bool clampProjectionMatrix(osg::Matrixf& projection, value_type& znear, value_type& zfar) const;
+        bool clampProjectionMatrix(osg::Matrixd& projection, value_type& znear, value_type& zfar) const;
 
         void setState(osg::State* state) { _state = state; }
         osg::State* getState() { return _state.get(); }
diff --git a/src/osgUtil/CullVisitor.cpp b/src/osgUtil/CullVisitor.cpp
index 4f76e0ea6..65341bd41 100644
--- a/src/osgUtil/CullVisitor.cpp
+++ b/src/osgUtil/CullVisitor.cpp
@@ -186,7 +186,8 @@ void CullVisitor::popProjectionMatrix()
     CullStack::popProjectionMatrix();
 }
 
-bool CullVisitor::clampProjectionMatrix(osg::Matrix& projection, value_type& znear, value_type& zfar) const
+template<class matrix_type, class value_type>
+bool _clampProjectionMatrix(matrix_type& projection, value_type& znear, value_type& zfar, value_type nearFarRatio)
 {
     if (zfar>0.0f)
     {
@@ -225,7 +226,7 @@ bool CullVisitor::clampProjectionMatrix(osg::Matrix& projection, value_type& zne
             value_type desired_zfar = zfar *1.02;
 
             // near plane clamping.
-            double min_near_plane = zfar*_nearFarRatio;
+            double min_near_plane = zfar*nearFarRatio;
             if (desired_znear<min_near_plane) desired_znear=min_near_plane;
 
             // assign the clamped values back to the computed values.
@@ -250,6 +251,16 @@ bool CullVisitor::clampProjectionMatrix(osg::Matrix& projection, value_type& zne
 }
 
 
+bool CullVisitor::clampProjectionMatrix(osg::Matrixf& projection, value_type& znear, value_type& zfar) const
+{
+    return _clampProjectionMatrix( projection, znear, zfar, _nearFarRatio );
+}
+
+bool CullVisitor::clampProjectionMatrix(osg::Matrixd& projection, value_type& znear, value_type& zfar) const
+{
+    return _clampProjectionMatrix( projection, znear, zfar, _nearFarRatio );
+}
+
 void CullVisitor::updateCalculatedNearFar(const osg::Matrix& matrix,const osg::BoundingBox& bb)
 {
 #if 0