diff --git a/platypush/backend/sensor/envirophat.py b/platypush/backend/sensor/envirophat.py
index 2d7711ab..ea51520b 100644
--- a/platypush/backend/sensor/envirophat.py
+++ b/platypush/backend/sensor/envirophat.py
@@ -47,7 +47,7 @@ class SensorEnvirophatBackend(SensorBackend):
             if enabled and sensor in sensors and sensors[sensor] != self._last_read.get(sensor)
         }
 
-        self._last_read = ret
+        self._last_read = sensors
         return ret