diff --git a/shutter.position b/shutter.position
index e8f1683cdce4ccbe6cb831953f9b813255ab603b..96693c29c2631c53d98e5aa5d64c876a76cf3265 100644
--- a/shutter.position
+++ b/shutter.position
@@ -26,7 +26,7 @@
     }
   },
   "datamodel": {
-    "position": {
+    "position_t": {
       "description": "Level of aperture of the shutter",
       "unit": "%",
       "type": "data = (0..100) / (0.0..100.0)"