diff --git a/core/dcb.c b/core/dcb.c
index 6db392d14..51fbef92b 100644
--- a/core/dcb.c
+++ b/core/dcb.c
@@ -35,6 +35,10 @@
  * 28/06/13	Mark Riddoch		Changed the free mechanism ti
  * 					introduce a zombie state for the
  * 					dcb
+ * 02/07/2013	Massimiliano Pinto	Addition of delayqlock, delayq and authlock
+ *					for handling backend asynchronous protocol connection
+ *					and a generic lock for backend authentication
+ *
  * @endverbatim
  */
 #include <stdio.h>
@@ -77,7 +81,10 @@ DCB	*rval;
 		return NULL;
 	}
 	spinlock_init(&rval->writeqlock);
+	spinlock_init(&rval->delayqlock);
+	spinlock_init(&rval->authlock);
 	rval->writeq = NULL;
+	rval->delayq = NULL;
 	rval->remote = NULL;
 	rval->state = DCB_STATE_ALLOC;
 	rval->next = NULL;
diff --git a/include/dcb.h b/include/dcb.h
index fe9047397..4f818039f 100644
--- a/include/dcb.h
+++ b/include/dcb.h
@@ -39,6 +39,9 @@ struct service;
  * 11/06/13	Mark Riddoch		Updated GWPROTOCOL structure with new
  *					entry points
  * 18/06/13	Mark Riddoch		Addition of the listener entry point
+ * 02/06/2013	Massimiliano Pinto	Addition of delayqlock, delayq and authlock
+ *					for handling backend asynchronous protocol connection
+ *					and a generic lock for backend authentication
  *
  * @endverbatim
  */
@@ -134,6 +137,7 @@ typedef struct dcb {
 	GWBUF		*writeq;	/**< Write Data Queue */
 	SPINLOCK	delayqlock;	/**< Delay Backend Write Queue spinlock */
 	GWBUF		*delayq;	/**< Delay Backend Write Data Queue */
+	SPINLOCK	authlock;	/**< Generic Authorization spinlock */
 
 	DCBSTATS	stats;		/**< DCB related statistics */