diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 6efe216c01d2..a2afc94a5408 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -2544,7 +2544,7 @@ struct cfg80211_scan_request {
 	struct cfg80211_scan_6ghz_params *scan_6ghz_params;
 
 	/* keep last */
-	struct ieee80211_channel *channels[];
+	struct ieee80211_channel *channels[] __counted_by(n_channels);
 };
 
 static inline void get_random_mask_addr(u8 *buf, const u8 *addr, const u8 *mask)