diff --git a/custom_components/ecole_directe/sensor.py b/custom_components/ecole_directe/sensor.py
index d6825fd..6c5ec91 100644
--- a/custom_components/ecole_directe/sensor.py
+++ b/custom_components/ecole_directe/sensor.py
@@ -45,7 +45,7 @@ async def async_setup_entry(
     if (
         coordinator.data is not None
         and "session" in coordinator.data
-        and "eleves" in coordinator.data["session"]
+        and coordinator.data["session"].eleves is not None
     ):
         for eleve in coordinator.data["session"].eleves:
             sensors.append(EDChildSensor(coordinator, eleve))