diff --git a/include/osg/CullSettings b/include/osg/CullSettings
index d712ff5f3..10c4e9445 100644
--- a/include/osg/CullSettings
+++ b/include/osg/CullSettings
@@ -172,13 +172,13 @@ class SG_EXPORT CullSettings
         CullingMode getCullingMode() const { return _cullingMode; }
 
 
-        void setCullMask(const osg::Node::NodeMask nm) { _cullMask = nm; }
+        void setCullMask(osg::Node::NodeMask nm) { _cullMask = nm; }
         osg::Node::NodeMask getCullMask() const { return _cullMask; }
 
-        void setCullMaskLeft(const osg::Node::NodeMask nm) { _cullMaskLeft = nm; }
+        void setCullMaskLeft(osg::Node::NodeMask nm) { _cullMaskLeft = nm; }
         osg::Node::NodeMask getCullMaskLeft() const { return _cullMaskLeft; }
 
-        void setCullMaskRight(const osg::Node::NodeMask nm) { _cullMaskRight = nm; }
+        void setCullMaskRight(osg::Node::NodeMask nm) { _cullMaskRight = nm; }
         osg::Node::NodeMask getCullMaskRight() const { return _cullMaskRight; }
 
         /** Set the LOD bias for the CullVisitor to use.*/