diff --git a/simgear/scene/model/custtrans.cxx b/simgear/scene/model/custtrans.cxx
index bde8be13..c34dc02c 100755
--- a/simgear/scene/model/custtrans.cxx
+++ b/simgear/scene/model/custtrans.cxx
@@ -14,7 +14,7 @@ void SGCustomTransform::copy_from( SGCustomTransform *src, int clone_flags )
 {
   ssgBranch::copy_from( src, clone_flags );
   _callback = src->_callback;
-  _data = (void *)src->_callback;
+  _data = src->_data;
 }
 
 ssgBase *SGCustomTransform::clone( int clone_flags )