diff --git a/drivers/mtd/nand/cafe_ecc.c b/drivers/mtd/nand/cafe_ecc.c
index 1b9fa05a44747fdb7eeb9bb9049dc47e6131edf1..ea5c8491d2c57677250b012f1d9261494cead565 100644
--- a/drivers/mtd/nand/cafe_ecc.c
+++ b/drivers/mtd/nand/cafe_ecc.c
@@ -1045,7 +1045,7 @@ static unsigned short err_pos_lut[4096] = {
 
 static unsigned short err_pos(unsigned short din)
 {
-	BUG_ON(din > 4096);
+	BUG_ON(din >= ARRAY_SIZE(err_pos_lut));
 	return err_pos_lut[din];
 }
 static int chk_no_err_only(unsigned short *chk_syndrome_list, unsigned short *err_info)