diff --git a/[refs] b/[refs]
index 5021efafd335..8cc92d902567 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1e226773c7e79051aa8a48258fe6ae61d20332bf
+refs/heads/master: 005b0b076ff68a10cc7ca8d3ba32def3ae95ad96
diff --git a/trunk/net/caif/cfrfml.c b/trunk/net/caif/cfrfml.c
index 81660f809713..6dc75d4f8d94 100644
--- a/trunk/net/caif/cfrfml.c
+++ b/trunk/net/caif/cfrfml.c
@@ -190,7 +190,7 @@ static int cfrfml_receive(struct cflayer *layr, struct cfpkt *pkt)
 
 static int cfrfml_transmit_segment(struct cfrfml *rfml, struct cfpkt *pkt)
 {
-	caif_assert(cfpkt_getlen(pkt) < rfml->fragment_size);
+	caif_assert(cfpkt_getlen(pkt) < rfml->fragment_size + RFM_HEAD_SIZE);
 
 	/* Add info for MUX-layer to route the packet out. */
 	cfpkt_info(pkt)->channel_id = rfml->serv.layer.id;