diff --git a/factory_settings.ini b/factory_settings.ini
index f33239a31..d1f0d0986 100644
--- a/factory_settings.ini
+++ b/factory_settings.ini
@@ -24,7 +24,7 @@ build_flags =
     -D FACTORY_NTP_TIME_ZONE_LABEL=\"Europe/Amsterdam\"
     -D FACTORY_NTP_TIME_ZONE_FORMAT=\"CET-1CEST,M3.5.0,M10.5.0/3\"
     -D FACTORY_NTP_SERVER=\"time.google.com\"
-    -D FACTORY_NTP_THERMOSTAT_SYNC=0
+    -D FACTORY_NTP_THERMOSTAT_SYNC=1
 
     ; MQTT settings
     -D FACTORY_MQTT_ENABLED=false