diff --git a/drivers/mtd/mtdblock.c b/drivers/mtd/mtdblock.c
index 2cef280e388c..8e50170137e0 100644
--- a/drivers/mtd/mtdblock.c
+++ b/drivers/mtd/mtdblock.c
@@ -288,8 +288,7 @@ static int mtdblock_open(struct mtd_blktrans_dev *mbd)
 
 	mutex_init(&mtdblk->cache_mutex);
 	mtdblk->cache_state = STATE_EMPTY;
-	if ((mtdblk->mtd->flags & MTD_CAP_RAM) != MTD_CAP_RAM &&
-	    mtdblk->mtd->erasesize) {
+	if (mtdblk->mtd->type != MTD_RAM && mtdblk->mtd->erasesize) {
 		mtdblk->cache_size = mtdblk->mtd->erasesize;
 		mtdblk->cache_data = NULL;
 	}