diff --git a/libs_required/ACG/GL/globjects.hh b/libs_required/ACG/GL/globjects.hh
index ccc8f1eec1733424c0d03e0c6971d01351d12d9d..f387cfa4f411559e1f5df4c20d3c3ec17eec05c6 100644
--- a/libs_required/ACG/GL/globjects.hh
+++ b/libs_required/ACG/GL/globjects.hh
@@ -151,7 +151,7 @@ public:
 
   char* offset(unsigned int _offset) const
   {
-    return ((char*)NULL + _offset);
+    return reinterpret_cast<char*>(_offset);
   }
 
   GLuint id() const {return vbo;}