diff --git a/mt7921/main.c b/mt7921/main.c
index 5312e1dd..0f02a04a 100644
--- a/mt7921/main.c
+++ b/mt7921/main.c
@@ -652,9 +652,9 @@ static int mt7921_config(struct ieee80211_hw *hw, int radio_idx, u32 changed)
 	}
 
 	if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
-		ieee80211_iterate_active_interfaces(hw,
-						    IEEE80211_IFACE_ITER_RESUME_ALL,
-						    mt7921_sniffer_interface_iter, dev);
+		ieee80211_iterate_active_interfaces_mtx(hw,
+							IEEE80211_IFACE_ITER_RESUME_ALL,
+							mt7921_sniffer_interface_iter, dev);
 	}
 
 out: