diff --git a/net/wireless/util.c b/net/wireless/util.c
index 5433659a08ee..d032a31828f1 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -1309,7 +1309,7 @@ int cfg80211_check_combinations(struct wiphy *wiphy,
 			}
 		}
 
-		if (radar_detect && !(c->radar_detect_widths & radar_detect))
+		if (radar_detect != (c->radar_detect_widths & radar_detect))
 			goto cont;
 
 		/* Finally check that all iftypes that we're currently