diff -r 3d68bb0047a1 -r ec403cf308eb master/sync.c
--- a/master/sync.c	Tue Feb 12 15:30:34 2013 +0100
+++ b/master/sync.c	Tue Feb 12 15:46:43 2013 +0100
@@ -161,6 +161,8 @@
 /*****************************************************************************/
 
 /** Determines the default direction from the control register.
+ *
+ * \return Direction.
  */
 ec_direction_t ec_sync_default_direction(
         const ec_sync_t *sync /**< EtherCAT sync manager. */