diff --git a/Lib/encodings/mbcs.py b/Lib/encodings/mbcs.py
index 14db973af7db..ff77fdee9435 100644
--- a/Lib/encodings/mbcs.py
+++ b/Lib/encodings/mbcs.py
@@ -20,11 +20,11 @@ class Codec(codecs.Codec):
 
 class IncrementalEncoder(codecs.IncrementalEncoder):
     def encode(self, input, final=False):
-        return codecs.mbs_encode(input,self.errors)[0]
+        return codecs.mbcs_encode(input,self.errors)[0]
 
 class IncrementalDecoder(codecs.IncrementalDecoder):
     def decode(self, input, final=False):
-        return codecs.mbs_decode(input,self.errors)[0]
+        return codecs.mbcs_decode(input,self.errors)[0]
 class StreamWriter(Codec,codecs.StreamWriter):
     pass