diff -r 4844a8433915 -r 0c484ee12d89 master/master.h
--- a/master/master.h	Fri Aug 21 09:46:29 2009 +0200
+++ b/master/master.h	Fri Aug 21 12:15:16 2009 +0200
@@ -126,6 +126,8 @@
                                        reference clock to the master clock. */
     ec_datagram_t sync_datagram; /**< Datagram used for DC drift
                                    compensation. */
+    ec_datagram_t sync_mon_datagram; /**< Datagram used for DC synchronisation
+                                       monitoring. */
     ec_slave_t *dc_ref_clock; /**< DC reference clock slave. */
     
     unsigned int scan_busy; /**< Current scan state. */