diff --git a/sys/ia64/ia64/busdma_machdep.c b/sys/ia64/ia64/busdma_machdep.c
index 95b9521fe498..6496c9b07e81 100644
--- a/sys/ia64/ia64/busdma_machdep.c
+++ b/sys/ia64/ia64/busdma_machdep.c
@@ -325,7 +325,7 @@ bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map)
 #endif
 	}
 
-	if (map != NULL) {
+	if (map != NULL && map != &nobounce_dmamap) {
 		if (STAILQ_FIRST(&map->bpages) != NULL)
 			return (EBUSY);
 		free(map, M_DEVBUF);