diff --git a/sys/dev/ral/rt2860.c b/sys/dev/ral/rt2860.c
index a4e049b6fe9..a298f412f6e 100644
--- a/sys/dev/ral/rt2860.c
+++ b/sys/dev/ral/rt2860.c
@@ -2220,7 +2220,7 @@ static void
 rt2860_enable_mrr(struct rt2860_softc *sc)
 {
 #define CCK(mcs)	(mcs)
-#define OFDM(mcs)	(1 << 3 | (mcs))
+#define	OFDM(mcs)	(1U << 3 | (mcs))
 	RAL_WRITE(sc, RT2860_LG_FBK_CFG0,
 	    OFDM(6) << 28 |	/* 54->48 */
 	    OFDM(5) << 24 |	/* 48->36 */
@@ -3325,7 +3325,7 @@ b4inc(uint32_t b32, int8_t delta)
 			b4 = 0;
 		else if (b4 > 0xf)
 			b4 = 0xf;
-		b32 = b32 >> 4 | b4 << 28;
+		b32 = b32 >> 4 | (uint32_t)b4 << 28;
 	}
 	return b32;
 }