diff --git a/coreapi/callbacks.c b/coreapi/callbacks.c
index 62cf00835..28b980312 100644
--- a/coreapi/callbacks.c
+++ b/coreapi/callbacks.c
@@ -524,7 +524,7 @@ static void auth_requested(SalOp *h, const char *realm, const char *username){
 		ai->usecount++;
 	}else{
 		if (ai && ai->works==FALSE) {
-			register_failure(h, SalErrorFailure, SalReasonForbidden, _("Authentication failure"));
+			sal_op_cancel_authentication(h);
 		} 
 		if (lc->vtable.auth_info_requested)
 			lc->vtable.auth_info_requested(lc,realm,username);
diff --git a/coreapi/sal.h b/coreapi/sal.h
index 09ff05f81..5794427e4 100644
--- a/coreapi/sal.h
+++ b/coreapi/sal.h
@@ -276,6 +276,7 @@ void sal_op_set_from(SalOp *op, const char *from);
 void sal_op_set_to(SalOp *op, const char *to);
 void sal_op_release(SalOp *h);
 void sal_op_authenticate(SalOp *h, const SalAuthInfo *info);
+void sal_op_cancel_authentication(SalOp *h);
 void sal_op_set_user_pointer(SalOp *h, void *up);
 int sal_op_get_auth_requested(SalOp *h, const char **realm, const char **username);
 const char *sal_op_get_from(const SalOp *op);
diff --git a/coreapi/sal_eXosip2.c b/coreapi/sal_eXosip2.c
index 5c65cf80a..61c7c494d 100644
--- a/coreapi/sal_eXosip2.c
+++ b/coreapi/sal_eXosip2.c
@@ -21,7 +21,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #endif
 
 #include "sal_eXosip2.h"
-
+#include "private.h"
 #include "offeranswer.h"
 
 static void text_received(Sal *sal, eXosip_event_t *ev);
@@ -793,7 +793,16 @@ void sal_op_authenticate(SalOp *h, const SalAuthInfo *info){
 		h->auth_info=sal_auth_info_clone(info); /*store auth info for subsequent request*/
 	}
 }
+void sal_op_cancel_authentication(SalOp *h) {
+	if (h->rid >0) {
+		sal_op_get_sal(h)->callbacks.register_failure(h,SalErrorFailure, SalReasonForbidden,_("Authentication failure"));
+	} else if (h->cid >0) {
+		sal_op_get_sal(h)->callbacks.call_failure(h,SalErrorFailure, SalReasonForbidden,_("Authentication failure"),0);
+	} else {
+		ms_warning("Auth failure not handled");
+	}
 
+}
 static void set_network_origin(SalOp *op, osip_message_t *req){
 	const char *received=NULL;
 	int rport=5060;