diff --git a/appdaemon/plugins/hass/hassapi.py b/appdaemon/plugins/hass/hassapi.py
index 884ff401d..77050433f 100644
--- a/appdaemon/plugins/hass/hassapi.py
+++ b/appdaemon/plugins/hass/hassapi.py
@@ -384,7 +384,7 @@ def constrain_input_boolean(self, value: str | Iterable[str]) -> bool:
             case Iterable():
                 constraints = value if isinstance(value, list) else list(value)
 
-        assert isinstance(value, list) and all(isinstance(v, str) for v in value)
+        assert isinstance(constraints, list) and all(isinstance(v, str) for v in constraints)
 
         for constraint in constraints:
             parts = re.split(r',\s*', constraint)