diff --git a/src/ap/dfs.c b/src/ap/dfs.c
index 3fb1881..c30f6d6 100644
--- a/src/ap/dfs.c
+++ b/src/ap/dfs.c
@@ -916,8 +916,9 @@
 {
 	int n_chans, start_chan_idx;
 
-	if (!iface->current_mode)
-		return -1;
+	if (!iface->conf->ieee80211h || !iface->current_mode ||
+	    iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
+		return 0;
 
 	/* Get start (first) channel for current configuration */
 	start_chan_idx = dfs_get_start_chan_idx(iface);