diff --git a/include/re_bfcp.h b/include/re_bfcp.h
index 444c7a2..35ed009 100644
--- a/include/re_bfcp.h
+++ b/include/re_bfcp.h
@@ -259,18 +259,18 @@ int bfcp_listen(struct bfcp_conn **bcp, enum bfcp_transp tp, struct sa *laddr,
 /* request */
 int bfcp_request(struct bfcp_conn *bc, const struct sa *dst,
 		 enum bfcp_prim prim, uint32_t confid, uint16_t userid,
-		 bfcp_resp_h *resph, void *arg, uint32_t attrc, ...);
+		 bfcp_resp_h *resph, void *arg, unsigned attrc, ...);
 
 
 /* notify */
 int bfcp_notify(struct bfcp_conn *bc, const struct sa *dst,
 		enum bfcp_prim prim, uint32_t confid, uint16_t userid,
-		uint32_t attrc, ...);
+		unsigned attrc, ...);
 
 
 /* reply */
 int bfcp_reply(struct bfcp_conn *bc, const struct bfcp_msg *req,
-	       enum bfcp_prim prim, uint32_t attrc, ...);
+	       enum bfcp_prim prim, unsigned attrc, ...);
 int bfcp_edreply(struct bfcp_conn *bc, const struct bfcp_msg *req,
 		 enum bfcp_err code, const uint8_t *details, size_t len);
 int bfcp_ereply(struct bfcp_conn *bc, const struct bfcp_msg *req,
diff --git a/src/bfcp/bfcp.h b/src/bfcp/bfcp.h
index 28fd6ad..dae0785 100644
--- a/src/bfcp/bfcp.h
+++ b/src/bfcp/bfcp.h
@@ -51,4 +51,4 @@ int bfcp_send(struct bfcp_conn *bc, const struct sa *dst, struct mbuf *mb);
 bool bfcp_handle_response(struct bfcp_conn *bc, const struct bfcp_msg *msg);
 int  bfcp_vrequest(struct bfcp_conn *bc, const struct sa *dst,
 		   enum bfcp_prim prim, uint32_t confid, uint16_t userid,
-		   bfcp_resp_h *resph, void *arg, uint32_t attrc, va_list *ap);
+		   bfcp_resp_h *resph, void *arg, unsigned attrc, va_list *ap);
diff --git a/src/bfcp/reply.c b/src/bfcp/reply.c
index 24917fe..fb73ad7 100644
--- a/src/bfcp/reply.c
+++ b/src/bfcp/reply.c
@@ -39,7 +39,7 @@ static void tmr_handler(void *arg)
  * @return 0 if success, otherwise errorcode
  */
 int bfcp_reply(struct bfcp_conn *bc, const struct bfcp_msg *req,
-	       enum bfcp_prim prim, uint32_t attrc, ...)
+	       enum bfcp_prim prim, unsigned attrc, ...)
 {
 	va_list ap;
 	int err;
diff --git a/src/bfcp/request.c b/src/bfcp/request.c
index 616d256..d2b5764 100644
--- a/src/bfcp/request.c
+++ b/src/bfcp/request.c
@@ -142,7 +142,7 @@ bool bfcp_handle_response(struct bfcp_conn *bc, const struct bfcp_msg *msg)
 
 int bfcp_vrequest(struct bfcp_conn *bc, const struct sa *dst,
 		  enum bfcp_prim prim, uint32_t confid, uint16_t userid,
-		  bfcp_resp_h *resph, void *arg, uint32_t attrc, va_list *ap)
+		  bfcp_resp_h *resph, void *arg, unsigned attrc, va_list *ap)
 {
 	struct bfcp_ctrans *ct;
 	int err;
@@ -213,7 +213,7 @@ int bfcp_vrequest(struct bfcp_conn *bc, const struct sa *dst,
  */
 int bfcp_request(struct bfcp_conn *bc, const struct sa *dst,
 		 enum bfcp_prim prim, uint32_t confid, uint16_t userid,
-		 bfcp_resp_h *resph, void *arg, uint32_t attrc, ...)
+		 bfcp_resp_h *resph, void *arg, unsigned attrc, ...)
 {
 	va_list ap;
 	int err;
@@ -241,7 +241,7 @@ int bfcp_request(struct bfcp_conn *bc, const struct sa *dst,
  */
 int bfcp_notify(struct bfcp_conn *bc, const struct sa *dst,
 		enum bfcp_prim prim, uint32_t confid, uint16_t userid,
-		uint32_t attrc, ...)
+		unsigned attrc, ...)
 {
 	va_list ap;
 	int err;