diff --git a/importlib_metadata/_adapters.py b/importlib_metadata/_adapters.py
index e33cba5e..120e43a0 100644
--- a/importlib_metadata/_adapters.py
+++ b/importlib_metadata/_adapters.py
@@ -54,7 +54,7 @@ def __iter__(self):
     def __getitem__(self, item):
         """
         Warn users that a ``KeyError`` can be expected when a
-        mising key is supplied. Ref python/importlib_metadata#371.
+        missing key is supplied. Ref python/importlib_metadata#371.
         """
         res = super().__getitem__(item)
         if res is None: