--- a/src/ap/ubus.c
+++ b/src/ap/ubus.c
@@ -762,6 +762,7 @@ hostapd_switch_chan(struct ubus_context
 	struct blob_attr *tb[__CSA_MAX];
 	struct hostapd_data *hapd = get_hapd_from_object(obj);
 	struct csa_settings css;
+	int i;
 
 	blobmsg_parse(csa_policy, __CSA_MAX, tb, blob_data(msg), blob_len(msg));
 
@@ -787,8 +788,10 @@ hostapd_switch_chan(struct ubus_context
 	SET_CSA_SETTING(CSA_BLOCK_TX, block_tx, bool);
 
 
-	if (hostapd_switch_channel(hapd, &css) != 0)
-		return UBUS_STATUS_NOT_SUPPORTED;
+	for (i = 0; i < hapd->iface->num_bss; i++) {
+		if (hostapd_switch_channel(hapd->iface->bss[i], &css) != 0)
+			return UBUS_STATUS_NOT_SUPPORTED;
+	}
 
 	hostapd_ubus_handle_channel_switch_event(hapd->iface,HOSTAPD_UBUS_HIGH_INTERFERENCE,  css.freq_params.freq);