diff --git a/sys/dev/safexcel/safexcel.c b/sys/dev/safexcel/safexcel.c
index 2ed6bed6413..2fd13cd3f6d 100644
--- a/sys/dev/safexcel/safexcel.c
+++ b/sys/dev/safexcel/safexcel.c
@@ -783,15 +783,15 @@ safexcel_init_rings(struct safexcel_softc *sc)
 {
 	struct safexcel_cmd_descr *cdesc;
 	struct safexcel_ring *ring;
-	char buf[32];
 	uint64_t atok;
 	int i, j;
 
 	for (i = 0; i < sc->sc_config.rings; i++) {
 		ring = &sc->sc_ring[i];
 
-		snprintf(buf, sizeof(buf), "safexcel_ring%d", i);
-		mtx_init(&ring->mtx, buf, NULL, MTX_DEF);
+		snprintf(ring->lockname, sizeof(ring->lockname),
+		    "safexcel_ring%d", i);
+		mtx_init(&ring->mtx, ring->lockname, NULL, MTX_DEF);
 		STAILQ_INIT(&ring->free_requests);
 		STAILQ_INIT(&ring->ready_requests);
 		STAILQ_INIT(&ring->queued_requests);
diff --git a/sys/dev/safexcel/safexcel_var.h b/sys/dev/safexcel/safexcel_var.h
index 619bcff00c5..03e5e7da51f 100644
--- a/sys/dev/safexcel/safexcel_var.h
+++ b/sys/dev/safexcel/safexcel_var.h
@@ -384,6 +384,8 @@ struct safexcel_ring {
 
 	struct safexcel_dma_mem		dma_atok;
 	bus_dma_tag_t   		data_dtag;
+
+	char				lockname[32];
 };
 
 struct safexcel_intr_handle {