diff --git a/openbsc/src/gprs/gprs_sndcp.c b/openbsc/src/gprs/gprs_sndcp.c
index d3f02b6..a38bf91 100644
--- a/openbsc/src/gprs/gprs_sndcp.c
+++ b/openbsc/src/gprs/gprs_sndcp.c
@@ -501,7 +501,8 @@
 }
 
 /* Section 5.1.2.17 LL-UNITDATA.ind */
-int sndcp_llunitdata_ind(struct msgb *msg, struct gprs_llc_lle *lle, uint8_t *hdr, uint8_t len)
+int sndcp_llunitdata_ind(struct msgb *msg, struct gprs_llc_lle *lle,
+			 uint8_t *hdr, uint16_t len)
 {
 	struct gprs_sndcp_entity *sne;
 	struct sndcp_common_hdr *sch = (struct sndcp_common_hdr *)hdr;