1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/codecs.py b/Lib/codecs.py
index 293d5b7741..9178db9c3e 100644
--- a/Lib/codecs.py
+++ b/Lib/codecs.py
@@ -611,7 +611,7 @@ def make_encoding_map(decoding_map):
     """
     m = {}
     for k,v in decoding_map.items():
-        if not m.has_key(v):
+        if not v in m:
             m[v] = k
         else:
             m[v] = None