diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 1ad11de..04fa8bb 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -2168,7 +2168,7 @@
 }
 
 static int nl80211_send_chandef(struct sk_buff *msg,
-				 struct cfg80211_chan_def *chandef)
+				const struct cfg80211_chan_def *chandef)
 {
 	WARN_ON(!cfg80211_chandef_valid(chandef));
 
@@ -10874,7 +10874,7 @@
 
 void
 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
-		     struct cfg80211_chan_def *chandef,
+		     const struct cfg80211_chan_def *chandef,
 		     enum nl80211_radar_event event,
 		     struct net_device *netdev, gfp_t gfp)
 {