diff --git a/Lib/graphlib.py b/Lib/graphlib.py
index d0e7a48..1c5d9a4 100644
--- a/Lib/graphlib.py
+++ b/Lib/graphlib.py
@@ -17,7 +17,7 @@ def __init__(self, node):
         self.npredecessors = 0
 
         # List of successor nodes. The list can contain duplicated elements as
-        # long as they're all reflected in the successor's npredecessors attribute).
+        # long as they're all reflected in the successor's npredecessors attribute.
         self.successors = []