diff --git a/src/ranap_common.c b/src/ranap_common.c
index a468229..13c913f 100644
--- a/src/ranap_common.c
+++ b/src/ranap_common.c
@@ -291,7 +291,7 @@
 
 static struct msgb *ranap_msgb_alloc(void)
 {
-	return msgb_alloc_headroom(1024+256, 256, "RANAP Tx");
+	return msgb_alloc_headroom(1024+512, 512, "RANAP Tx");
 }
 
 static struct msgb *_ranap_gen_msg(RANAP_RANAP_PDU_t *pdu)