diff --git a/z_server/devices/__init__.py b/z_server/devices/__init__.py
index 5ddd436..22c6179 100644
--- a/z_server/devices/__init__.py
+++ b/z_server/devices/__init__.py
@@ -90,10 +90,11 @@ class brennenstuhl_heatingvalve(base):
 
     def __rx__(self, client, userdata, message):
         payload = json.loads(message.payload)
-        if message.topic == self.topic + '/set':
-            self.target("current_heating_setpoint", payload["current_heating_setpoint"])
-        if message.topic == self.topic:
-            self.state("current_heating_setpoint", payload["current_heating_setpoint"])
+        if "current_heating_setpoint" in payload:
+            if message.topic == self.topic + '/set':
+                self.target("current_heating_setpoint", payload["current_heating_setpoint"])
+            if message.topic == self.topic:
+                self.state("current_heating_setpoint", payload["current_heating_setpoint"])
 
 
 class silvercrest_powerplug(base):