diff --git a/Data/Encoding/Preprocessor/Mapping.hs b/Data/Encoding/Preprocessor/Mapping.hs
index 0c1ae0e..9502517 100644
--- a/Data/Encoding/Preprocessor/Mapping.hs
+++ b/Data/Encoding/Preprocessor/Mapping.hs
@@ -10,7 +10,6 @@ import Data.Char
 import Data.Word
 import Data.Ix
 import Data.Bits
-import Data.Encoding.Preprocessor.Addr
 import Data.Array.Static.Builder
 import Data.CharMap.Builder