diff --git a/homeassistant/setup.py b/homeassistant/setup.py
index a917eb65b69..67740c54254 100644
--- a/homeassistant/setup.py
+++ b/homeassistant/setup.py
@@ -31,6 +31,7 @@ BASE_PLATFORMS = {
     "alarm_control_panel",
     "binary_sensor",
     "camera",
+    "calendar",
     "climate",
     "cover",
     "device_tracker",