diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c
index 4aa2fd8633e769b0ae6b09ecf3e267031a00c1f3..0e6bfaf850f3d5cb11a621aa7a96b1b5440699f5 100644
--- a/drivers/mtd/ubi/fastmap.c
+++ b/drivers/mtd/ubi/fastmap.c
@@ -775,7 +775,7 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
 		for (j = 0; j < be32_to_cpu(fm_eba->reserved_pebs); j++) {
 			int pnum = be32_to_cpu(fm_eba->pnum[j]);
 
-			if ((int)be32_to_cpu(fm_eba->pnum[j]) < 0)
+			if (pnum < 0)
 				continue;
 
 			aeb = NULL;