diff --git a/docs/usage.rst b/docs/usage.rst
index 9d56359d..a5b528fa 100644
--- a/docs/usage.rst
+++ b/docs/usage.rst
@@ -263,6 +263,7 @@ Init the calendar::
 
   >>> cal = Calendar()
   >>> from datetime import datetime
+  >>> import pytz
 
 Some properties are required to be compliant::