diff --git a/drivers/media/i2c/rdacm21.c b/drivers/media/i2c/rdacm21.c
index dcc21515e5a43ca29518402c074ce99e2363d748..179d107f494cac7418303b0cfda267d6653bb98d 100644
--- a/drivers/media/i2c/rdacm21.c
+++ b/drivers/media/i2c/rdacm21.c
@@ -345,7 +345,7 @@ static int ov10640_initialize(struct rdacm21_device *dev)
 	/* Read OV10640 ID to test communications. */
 	ov490_write_reg(dev, OV490_SCCB_SLAVE0_DIR, OV490_SCCB_SLAVE_READ);
 	ov490_write_reg(dev, OV490_SCCB_SLAVE0_ADDR_HIGH, OV10640_CHIP_ID >> 8);
-	ov490_write_reg(dev, OV490_SCCB_SLAVE0_ADDR_LOW, (u8)OV10640_CHIP_ID);
+	ov490_write_reg(dev, OV490_SCCB_SLAVE0_ADDR_LOW, OV10640_CHIP_ID & 0xff);
 
 	/* Trigger SCCB slave transaction and give it some time to complete. */
 	ov490_write_reg(dev, OV490_HOST_CMD, OV490_HOST_CMD_TRIGGER);