diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
index 1cc146cfc1f3dce02d4d83c7e79b698f07b161c9..e506fcd3ca04350416dce7a640f2483a97d5d34d 100644
--- a/drivers/i2c/busses/i2c-rcar.c
+++ b/drivers/i2c/busses/i2c-rcar.c
@@ -76,8 +76,8 @@
 #define RCAR_IRQ_RECV	(MNR | MAL | MST | MAT | MDR)
 #define RCAR_IRQ_STOP	(MST)
 
-#define RCAR_IRQ_ACK_SEND	(~(MAT | MDE))
-#define RCAR_IRQ_ACK_RECV	(~(MAT | MDR))
+#define RCAR_IRQ_ACK_SEND	(~(MAT | MDE) & 0xFF)
+#define RCAR_IRQ_ACK_RECV	(~(MAT | MDR) & 0xFF)
 
 #define ID_LAST_MSG	(1 << 0)
 #define ID_IOERROR	(1 << 1)