diff --git a/libnymea/interfaces/closablesensor.json b/libnymea/interfaces/closablesensor.json
index d542bf24..b8ef5b55 100644
--- a/libnymea/interfaces/closablesensor.json
+++ b/libnymea/interfaces/closablesensor.json
@@ -1,5 +1,6 @@
 {
     "description": "This interface can be used for i.e. magnetic window/door sensors",
+    "extends": "sensor",
     "states": [
         {
             "name": "closed",