diff --git a/homeassistant/components/climate/sensibo.py b/homeassistant/components/climate/sensibo.py
index b49d379592f74f..7b4c8ed8b1bdf5 100644
--- a/homeassistant/components/climate/sensibo.py
+++ b/homeassistant/components/climate/sensibo.py
@@ -29,7 +29,7 @@
 
 _LOGGER = logging.getLogger(__name__)
 
-ALL = 'all'
+ALL = ['all']
 TIMEOUT = 10
 
 SERVICE_ASSUME_STATE = 'sensibo_assume_state'