diff --git a/include/osg/GLU b/include/osg/GLU
index 646468104..754614a30 100644
--- a/include/osg/GLU
+++ b/include/osg/GLU
@@ -15,9 +15,11 @@
 #define OSG_GLU 1
 
 #ifdef __APPLE__
-	#include <OpenGL/glu.h>
+    #include <OpenGL/glu.h>
+    #define GLU_TESS_CALLBACK GLvoid (CALLBACK*)(...)
 #else
-	#include <GL/glu.h>
+    #include <GL/glu.h>
+    #define GLU_TESS_CALLBACK GLvoid (CALLBACK*)()
 #endif
 
 #endif  // __osgGLU_h
diff --git a/src/osgPlugins/dw/ReaderWriterDW.cpp b/src/osgPlugins/dw/ReaderWriterDW.cpp
index d4cb54e61..512985734 100644
--- a/src/osgPlugins/dw/ReaderWriterDW.cpp
+++ b/src/osgPlugins/dw/ReaderWriterDW.cpp
@@ -754,11 +754,11 @@ void _dwobj::buildDrawable(Group *grp, const osgDB::ReaderWriter::Options *optio
 			
 			
 			GLUtesselator* ts=gluNewTess();
-			gluTessCallback(ts, GLU_TESS_BEGIN, (void (CALLBACK *) ())myFaceBegin);  
-			gluTessCallback(ts, GLU_TESS_VERTEX, (GLvoid (CALLBACK *) ())myVertex);  
-			gluTessCallback(ts, GLU_TESS_END, (GLvoid (CALLBACK *) ())myFaceEnd);  
-			gluTessCallback(ts, GLU_TESS_ERROR, (GLvoid (CALLBACK *) ())error);  
-			gluTessCallback(ts, GLU_TESS_COMBINE_DATA, (GLvoid (CALLBACK *) ()) &combineCallback);
+			gluTessCallback(ts, GLU_TESS_BEGIN, (GLU_TESS_CALLBACK) myFaceBegin);  
+			gluTessCallback(ts, GLU_TESS_VERTEX, (GLU_TESS_CALLBACK) myVertex);  
+			gluTessCallback(ts, GLU_TESS_END, (GLU_TESS_CALLBACK) myFaceEnd);  
+			gluTessCallback(ts, GLU_TESS_ERROR, (GLU_TESS_CALLBACK) error);  
+			gluTessCallback(ts, GLU_TESS_COMBINE_DATA, (GLU_TESS_CALLBACK) combineCallback);
 			//  for (int nvf=0; nvf<6; nvf++) { // for each length of face
 			// for Geometry we dont need to collect prim types individually
 			//     prd.setmode(nvf , nfnvf); // filter out only this type of tesselated face
diff --git a/src/osgPlugins/lwo/Tessellator.cpp b/src/osgPlugins/lwo/Tessellator.cpp
index 51c4ac226..3fc006de4 100644
--- a/src/osgPlugins/lwo/Tessellator.cpp
+++ b/src/osgPlugins/lwo/Tessellator.cpp
@@ -46,10 +46,10 @@ bool Tessellator::tessellate(const Polygon &poly, const osg::Vec3Array *points,
 
 	GLUtesselator *tess = gluNewTess();
 
-	gluTessCallback(tess, GLU_TESS_BEGIN_DATA, reinterpret_cast<void (CALLBACK *)()>(cb_begin_data));
-	gluTessCallback(tess, GLU_TESS_VERTEX_DATA, reinterpret_cast<void (CALLBACK *)()>(cb_vertex_data));
-	gluTessCallback(tess, GLU_TESS_END_DATA, reinterpret_cast<void (CALLBACK *)()>(cb_end_data));
-	gluTessCallback(tess, GLU_TESS_ERROR_DATA, reinterpret_cast<void (CALLBACK *)()>(cb_error_data));
+	gluTessCallback(tess, GLU_TESS_BEGIN_DATA, (GLU_TESS_CALLBACK) (cb_begin_data));
+	gluTessCallback(tess, GLU_TESS_VERTEX_DATA, (GLU_TESS_CALLBACK) (cb_vertex_data));
+	gluTessCallback(tess, GLU_TESS_END_DATA, (GLU_TESS_CALLBACK) (cb_end_data));
+	gluTessCallback(tess, GLU_TESS_ERROR_DATA, (GLU_TESS_CALLBACK) (cb_error_data));
 
 	gluTessBeginPolygon(tess, this);
 	gluTessBeginContour(tess);	
diff --git a/src/osgUtil/Tesselator.cpp b/src/osgUtil/Tesselator.cpp
index fd706016d..9f809dad7 100644
--- a/src/osgUtil/Tesselator.cpp
+++ b/src/osgUtil/Tesselator.cpp
@@ -35,17 +35,19 @@ Tesselator::~Tesselator()
     reset();
 }
 
+
+
 void Tesselator::beginTesselation()
 {
     reset();
 
     if (!_tobj) _tobj = gluNewTess();
     
-    gluTessCallback(_tobj, GLU_TESS_VERTEX_DATA, (GLvoid (CALLBACK*)()) vertexCallback);
-    gluTessCallback(_tobj, GLU_TESS_BEGIN_DATA,  (GLvoid (CALLBACK*)()) beginCallback);
-    gluTessCallback(_tobj, GLU_TESS_END_DATA,    (GLvoid (CALLBACK*)()) endCallback);
-    gluTessCallback(_tobj, GLU_TESS_COMBINE_DATA,(GLvoid (CALLBACK*)()) combineCallback);
-    gluTessCallback(_tobj, GLU_TESS_ERROR_DATA,  (GLvoid (CALLBACK*)()) errorCallback);
+    gluTessCallback(_tobj, GLU_TESS_VERTEX_DATA, (GLU_TESS_CALLBACK) vertexCallback);
+    gluTessCallback(_tobj, GLU_TESS_BEGIN_DATA,  (GLU_TESS_CALLBACK) beginCallback);
+    gluTessCallback(_tobj, GLU_TESS_END_DATA,    (GLU_TESS_CALLBACK) endCallback);
+    gluTessCallback(_tobj, GLU_TESS_COMBINE_DATA,(GLU_TESS_CALLBACK) combineCallback);
+    gluTessCallback(_tobj, GLU_TESS_ERROR_DATA,  (GLU_TESS_CALLBACK) errorCallback);
 
     gluTessBeginPolygon(_tobj,this);
 }