diff --git a/src/libmsc/sgs_iface.c b/src/libmsc/sgs_iface.c
index ad73289..a845ab8 100644
--- a/src/libmsc/sgs_iface.c
+++ b/src/libmsc/sgs_iface.c
@@ -124,7 +124,7 @@
 	LOG_MSUB(msub, LOGL_ERROR, "Force releasing previous subscriber connection: an SGs connection for this"
 		 " subscriber is being initiated\n");
 
-	msc_a_release_mo(msub_msc_a(msub), GSM48_REJECT_CONGESTION);
+	msc_a_release_mo(msub_msc_a(msub), GSM_CAUSE_AUTH_FAILED);
 	/* TODO: is this strong enough? After this, it should be completely disassociated with this subscriber. */
 }