diff --git a/Lib/lib-tk/ttk.py b/Lib/lib-tk/ttk.py
index 2fd513a..d632f77 100644
--- a/Lib/lib-tk/ttk.py
+++ b/Lib/lib-tk/ttk.py
@@ -1253,7 +1253,7 @@
 
 
     def exists(self, item):
-        """Returns True if the specified item is present in the three,
+        """Returns True if the specified item is present in the tree,
         False otherwise."""
         return bool(self.tk.call(self._w, "exists", item))