diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index ae219b8a7754a6684d128a073eed7ceaaeeb8048..2646faffd36e9ad3054f3d83a307b280f1fb913f 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -140,7 +140,7 @@
 #define FLEXCAN_TX_MB				63
 #define FLEXCAN_RX_MB_OFF_TIMESTAMP_FIRST	(FLEXCAN_TX_MB_RESERVED_OFF_TIMESTAMP + 1)
 #define FLEXCAN_RX_MB_OFF_TIMESTAMP_LAST	(FLEXCAN_TX_MB - 1)
-#define FLEXCAN_IFLAG_MB(x)		BIT(x & 0x1f)
+#define FLEXCAN_IFLAG_MB(x)		BIT((x) & 0x1f)
 #define FLEXCAN_IFLAG_RX_FIFO_OVERFLOW	BIT(7)
 #define FLEXCAN_IFLAG_RX_FIFO_WARN	BIT(6)
 #define FLEXCAN_IFLAG_RX_FIFO_AVAILABLE	BIT(5)