diff --git a/custom_components/tahoma/tahoma_api.py b/custom_components/tahoma/tahoma_api.py
index 183d9207c..955b520aa 100644
--- a/custom_components/tahoma/tahoma_api.py
+++ b/custom_components/tahoma/tahoma_api.py
@@ -650,7 +650,7 @@ def active_states(self):
     def set_active_state(self, name, value):
         """Set active state."""
         if name not in self.__active_states.keys():
-            raise ValueError("Can not set unknown state '" + name + "'")
+            self.__active_states[name] = value
 
         if (isinstance(self.__active_states[name], int) and
                 isinstance(value, str)):