diff --git a/src/libmsc/gsup_client_mux.c b/src/libmsc/gsup_client_mux.c
index 1900377..9a0dc16 100644
--- a/src/libmsc/gsup_client_mux.c
+++ b/src/libmsc/gsup_client_mux.c
@@ -150,6 +150,8 @@
 		.cause = cause,
 		.message_type = OSMO_GSUP_TO_MSGT_ERROR(gsup_orig->message_type),
 		.message_class = gsup_orig->message_class,
+		.destination_name = gsup_orig->source_name,
+		.destination_name_len = gsup_orig->source_name_len,
 
 		/* RP-Message-Reference is mandatory for SM Service */
 		.sm_rp_mr = gsup_orig->sm_rp_mr,