diff --git a/Lib/string.py b/Lib/string.py
index 62e8f2f..89287c4 100644
--- a/Lib/string.py
+++ b/Lib/string.py
@@ -14,6 +14,10 @@
 
 """
 
+__all__ = ["ascii_letters", "ascii_lowercase", "ascii_uppercase", "capwords",
+           "digits", "hexdigits", "octdigits", "printable", "punctuation",
+           "whitespace", "Formatter", "Template"]
+
 import _string
 
 # Some strings for ctype-style character classification
@@ -46,7 +50,7 @@
 
 ####################################################################
 import re as _re
-from collections import ChainMap
+from collections import ChainMap as _ChainMap
 
 class _TemplateMetaclass(type):
     pattern = r"""
@@ -104,7 +108,7 @@
         if not args:
             mapping = kws
         elif kws:
-            mapping = ChainMap(kws, args[0])
+            mapping = _ChainMap(kws, args[0])
         else:
             mapping = args[0]
         # Helper function for .sub()
@@ -134,7 +138,7 @@
         if not args:
             mapping = kws
         elif kws:
-            mapping = ChainMap(kws, args[0])
+            mapping = _ChainMap(kws, args[0])
         else:
             mapping = args[0]
         # Helper function for .sub()
diff --git a/Misc/NEWS b/Misc/NEWS
index f51918b..64fefad 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -131,6 +131,8 @@
 Library
 -------
 
+- Issue #26809: Add ``__all__`` to :mod:`string`.  Patch by Emanuel Barry.
+
 - Issue #26373: subprocess.Popen.communicate now correctly ignores
   BrokenPipeError when the child process dies before .communicate()
   is called in more/all circumstances.