diff --git a/site.conf b/site.conf
index c2ee9a4..7e9602b 100644
--- a/site.conf
+++ b/site.conf
@@ -14,7 +14,7 @@
     wifi24 = {
         ssid = 'Freifunk',
         channel = 5,
-        htmode = 'HT40-',
+        htmode = 'HT20',
         mesh_ssid = 'troisdorf-ff-mesh',
         mesh_bssid = '02:74:05:d0:4f:00',
         mesh_mcast_rate = 12000,