diff -r 3b7506f63335 -r f3d2589f22d6 qtms/src/qtmsdtmfimpl.cpp
--- a/qtms/src/qtmsdtmfimpl.cpp	Wed Jun 16 16:05:08 2010 +0100
+++ b/qtms/src/qtmsdtmfimpl.cpp	Thu Jul 22 16:38:21 2010 +0100
@@ -57,13 +57,13 @@
     }
 
 gint QTMSDTMFImpl::AddObserver(TMS::TMSDTMFObserver& obsrvr,
-        gpointer /*user_data*/)
+        gpointer user_data)
     {
     gint ret(QTMS_RESULT_UNINITIALIZED_OBJECT);
 
     if (iDtmf)
         {
-        ret = iDtmf->AddObserver(obsrvr, NULL);
+        ret = iDtmf->AddObserver(obsrvr, user_data);
         }
     return ret;
     }