diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 29c0a0e1f52c..5a0564e1dbd6 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -98,6 +98,9 @@ void ieee80211_prepare_rates(struct ieee80211_local *local,
 			    rate->rate == 55 || rate->rate == 110)
 				rate->flags |= IEEE80211_RATE_BASIC;
 			break;
+		case NUM_IEEE80211_MODES:
+			/* not useful */
+			break;
 		}
 
 		/* Set ERP and MANDATORY flags based on phymode */
@@ -118,6 +121,9 @@ void ieee80211_prepare_rates(struct ieee80211_local *local,
 			    rate->rate == 240)
 				rate->flags |= IEEE80211_RATE_MANDATORY;
 			break;
+		case NUM_IEEE80211_MODES:
+			/* not useful */
+			break;
 		}
 		if (ieee80211_is_erp_rate(mode->mode, rate->rate))
 			rate->flags |= IEEE80211_RATE_ERP;