diff --git a/src/libosmo-mgcp/mgcp_protocol.c b/src/libosmo-mgcp/mgcp_protocol.c
index aef41e0..e69c00f 100644
--- a/src/libosmo-mgcp/mgcp_protocol.c
+++ b/src/libosmo-mgcp/mgcp_protocol.c
@@ -1467,6 +1467,10 @@
 		return create_ok_response(NULL, 200, "DLCX", pdata->trans);
 	}
 
+	/* The logic does not permit to go past this point without having the
+	 * the endp pointer populated. */
+	OSMO_ASSERT(endp);
+
 	/* When no connection id is supplied, we will interpret this as a
 	 * wildcarded DLCX that refers to the selected endpoint. This means
 	 * that we drop all connections on that specific endpoint at once.