diff --git a/src/cw/dot11.h b/src/cw/dot11.h
index ab316aba..ada21280 100644
--- a/src/cw/dot11.h
+++ b/src/cw/dot11.h
@@ -238,8 +238,8 @@ static inline int  dot11_put_ssid(uint8_t *dst,uint8_t * ssid,int len){
 
 }
 
-#define dot11_float2rate(frate) ((int)(frate*2+0.5))
-#define dot11 rate2float(rate) ((float)(rate)/2.0)
+#define dot11_float2rate(frate) ((int)((frate)*2+0.5))
+#define dot11 rate2float(rate) (((float)(rate))/2.0)
 
 static inline int dot11_put_supported_rates(uint8_t *dst, float *basic, float *rates){
 	uint8_t *d = dst+2;