diff --git a/openbsc/src/gprs/gprs_llc.c b/openbsc/src/gprs/gprs_llc.c
index 5394f11..293c657 100644
--- a/openbsc/src/gprs/gprs_llc.c
+++ b/openbsc/src/gprs/gprs_llc.c
@@ -321,7 +321,7 @@
 
 /* parse a GPRS LLC header, also check for invalid frames */
 static int gprs_llc_hdr_parse(struct gprs_llc_hdr_parsed *ghp,
-			      const uint8_t *llc_hdr, int len)
+			      uint8_t *llc_hdr, int len)
 {
 	uint8_t *ctrl = llc_hdr+1;
 	int is_sack = 0;
@@ -497,7 +497,7 @@
 	/* Identifiers from DOWN: NSEI, BVCI, TLLI */
 
 	memset(&llhp, 0, sizeof(llhp));
-	rc = gprs_llc_hdr_parse(&llhp, lh, TLVP_LEN(tv, BSSGP_IE_LLC_PDU));
+	rc = gprs_llc_hdr_parse(&llhp, (uint8_t *) lh, TLVP_LEN(tv, BSSGP_IE_LLC_PDU));
 	gprs_llc_hdr_dump(&llhp);
 	if (rc < 0) {
 		LOGP(DLLC, LOGL_NOTICE, "Error during LLC header parsing\n");