diff --git a/src/Database/RocksDB/C.hsc b/src/Database/RocksDB/C.hs
similarity index 97%
rename from src/Database/RocksDB/C.hsc
rename to src/Database/RocksDB/C.hs
index ca4d693..12d0d24 100644
--- a/src/Database/RocksDB/C.hsc
+++ b/src/Database/RocksDB/C.hs
@@ -14,12 +14,6 @@ import Foreign
 import Foreign.C.Types
 import Foreign.C.String
 
-#ifdef mingw32_HOST_OS
-#include <rocksdb\c.h>
-#else
-#include <rocksdb/c.h>
-#endif
-
 data RocksDB
 data LCache
 data LComparator
@@ -51,15 +45,14 @@ type Val    = CString
 
 newtype CompressionOpt = CompressionOpt { compressionOpt :: CInt }
   deriving (Eq, Show)
-#{enum CompressionOpt, CompressionOpt
- , noCompression     = 0
- , snappyCompression = 1
- , zlibCompression   = 2
- , bz2Compression    = 3
- , lz4Compression    = 4
- , lz4hcCompression  = 5
- }
 
+noCompression, snappyCompression, zlibCompression, bz2Compression, lz4Compression, lz4hcCompression :: CompressionOpt
+noCompression = CompressionOpt 0
+snappyCompression = CompressionOpt 1
+zlibCompression = CompressionOpt 2
+bz2Compression = CompressionOpt 3
+lz4Compression = CompressionOpt 4
+lz4hcCompression = CompressionOpt 5
 
 foreign import ccall safe "rocksdb\\c.h rocksdb_open"
   c_rocksdb_open :: OptionsPtr -> DBName -> ErrPtr -> IO RocksDBPtr
diff --git a/src/Database/RocksDB/Internal.hs b/src/Database/RocksDB/Internal.hs
index edad62c..f03387c 100644
--- a/src/Database/RocksDB/Internal.hs
+++ b/src/Database/RocksDB/Internal.hs
@@ -106,12 +106,9 @@ mkOpts Options{..} = do
     return (Options' opts_ptr Nothing cmp)
 
   where
-    ccompression NoCompression =
-        noCompression
-    ccompression SnappyCompression =
-        snappyCompression
-    ccompression ZlibCompression =
-        zlibCompression
+    ccompression NoCompression = noCompression
+    ccompression SnappyCompression = snappyCompression
+    ccompression ZlibCompression = zlibCompression
 
     maybeSetCmp :: OptionsPtr -> Maybe Comparator -> IO (Maybe Comparator')
     maybeSetCmp opts_ptr (Just mcmp) = Just <$> setcmp opts_ptr mcmp