Index: Lib/fnmatch.py
===================================================================
--- Lib/fnmatch.py	(revision 83970)
+++ Lib/fnmatch.py	(working copy)
@@ -102,6 +102,19 @@
                 elif stuff[0] == '^':
                     stuff = '\\' + stuff
                 res = '%s[%s]' % (res, stuff)
+        elif c == '{':
+            j = i
+            if j < n and pat[j] == '}':
+                j = j+1
+            while i < n and pat[j] != '}':
+                j = j+1
+            if j >= n:
+                res = res + '\\{'
+            else:
+                stuff = pat[i:j].replace('\\','\\\\')
+                i = j+1
+                subres = '|'.join(stuff.split(','))
+                res = '%s(%s)' % (res, subres)
         else:
             res = res + re.escape(c)
     return res + '\Z(?ms)'
Index: Lib/test/test_fnmatch.py
===================================================================
--- Lib/test/test_fnmatch.py	(revision 83970)
+++ Lib/test/test_fnmatch.py	(working copy)
@@ -30,6 +30,8 @@
         check('abc', 'ab[de]', 0)
         check('a', '??', 0)
         check('a', 'b', 0)
+        check('abc', '{a,b}bc', 1)
+        check('abc', '{b,c}bc', 0)
 
         # these test that '\' is handled correctly in character sets;
         # see SF bug #409651