usage bb_dev_null
diff --git a/e2fsprogs/blkid/cache.c b/e2fsprogs/blkid/cache.c
index 88cc326..0dd1b62 100644
--- a/e2fsprogs/blkid/cache.c
+++ b/e2fsprogs/blkid/cache.c
@@ -111,7 +111,7 @@
 			argv[1] ? argv[1] : BLKID_CACHE_FILE);
 		exit(1);
 	}
-	if ((ret = blkid_get_cache(&cache, "/dev/null")) != 0) {
+	if ((ret = blkid_get_cache(&cache, bb_dev_null)) != 0) {
 		fprintf(stderr, "%s: error creating cache (%d)\n",
 			argv[0], ret);
 		exit(1);