diff --git a/Tools/scripts/fixdiv.py b/Tools/scripts/fixdiv.py
index 7e1ed0b..b2cab88 100755
--- a/Tools/scripts/fixdiv.py
+++ b/Tools/scripts/fixdiv.py
@@ -198,7 +198,7 @@
         list = warnings.get(filename)
         if list is None:
             warnings[filename] = list = []
-        list.append((int(lineno), intern(what)))
+        list.append((int(lineno), sys.intern(what)))
     f.close()
     return warnings