diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index e67b424..8fa6e6c 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -618,7 +618,7 @@
 		printk(KERN_DEBUG "  %s: BCNINT: %d\n",
 		       wiphy_name(hw->wiphy), info->beacon_int);
 		data->beacon_int = 1024 * info->beacon_int / 1000 * HZ / 1000;
-		if (WARN_ON(data->beacon_int))
+		if (WARN_ON(!data->beacon_int))
 			data->beacon_int = 1;
 	}