diff --git a/nimble/host/mesh/src/prov.c b/nimble/host/mesh/src/prov.c
index cb6123184..f9830d349 100644
--- a/nimble/host/mesh/src/prov.c
+++ b/nimble/host/mesh/src/prov.c
@@ -1375,6 +1375,8 @@ static void gen_prov_ack(struct prov_rx *rx, struct os_mbuf *buf)
 
 static void gen_prov_start(struct prov_rx *rx, struct os_mbuf *buf)
 {
+	u16_t trailing_space = 0;
+	
 	if (link.rx.seg) {
 		BT_WARN("Got Start while there are unreceived segments");
 		return;
@@ -1386,7 +1388,7 @@ static void gen_prov_start(struct prov_rx *rx, struct os_mbuf *buf)
 		return;
 	}
 	
-	u16_t trailing_space = OS_MBUF_TRAILINGSPACE(link.rx.buf);
+	trailing_space = OS_MBUF_TRAILINGSPACE(link.rx.buf);
 
 	link.rx.buf->om_len = net_buf_simple_pull_be16(buf);
 	link.rx.id  = rx->xact_id;