diff --git a/src/mncc.c b/src/mncc.c
index f2e2579..16eed96 100644
--- a/src/mncc.c
+++ b/src/mncc.c
@@ -472,7 +472,7 @@ static void check_setup(struct mncc_connection *conn, const char *buf, int rc)
 	struct call *call;
 	struct mncc_call_leg *leg;
 
-	if (rc != sizeof(*data)) {
+	if (rc < sizeof(*data)) {
 		LOGP(DMNCC, LOGL_ERROR, "gsm_mncc of wrong size %d vs. %zu\n",
 			rc, sizeof(*data));
 		return close_connection(conn);
@@ -548,7 +548,7 @@ static struct mncc_call_leg *find_leg(struct mncc_connection *conn,
 {
 	struct mncc_call_leg *leg;
 
-	if (rc != sizeof(**mncc)) {
+	if (rc < sizeof(**mncc)) {
 		LOGP(DMNCC, LOGL_ERROR, "gsm_mncc of wrong size %d vs. %zu\n",
 			rc, sizeof(**mncc));
 		close_connection(conn);