diff --git a/xblock/core.py b/xblock/core.py
index 0633c52dc..f806df7dc 100644
--- a/xblock/core.py
+++ b/xblock/core.py
@@ -196,7 +196,7 @@ def __init__(self, runtime, field_data=None, scope_ids=UNSET, *args, **kwargs):
     @property
     def usage_key(self):
         """
-        Convenient abbreviation for :py:attr:`.XBlock`.scope_ids.usage_id`.
+        Convenient abbreviation for :py:attr:`.XBlock.scope_ids.usage_id`.
         """
         return self.scope_ids.usage_id