diff --git a/System/Hardware/Serialport/Types.hs b/System/Hardware/Serialport/Types.hs
new file mode 100644
--- /dev/null
+++ b/System/Hardware/Serialport/Types.hs
@@ -0,0 +1,69 @@
+{-# LANGUAGE CPP #-}
+module System.Hardware.Serialport.Types where
+
+import Data.Word
+#if defined(mingw32_HOST_OS)
+import System.Win32.Types (HANDLE)
+#else
+import System.Posix.Types (Fd)
+#endif
+
+
+-- | Supported baudrates
+data CommSpeed
+  = CS110
+  | CS300
+  | CS600
+  | CS1200
+  | CS2400
+  | CS4800
+  | CS9600
+  | CS19200
+  | CS38400
+  | CS57600
+  | CS115200
+  deriving (Show)
+
+
+data StopBits = One | Two
+data Parity = Even | Odd | NoParity
+data FlowControl = Software | NoFlowControl
+
+data SerialPortSettings = SerialPortSettings {
+                      commSpeed :: CommSpeed,     -- ^ baudrate
+                      bitsPerWord :: Word8,       -- ^ Number of bits in a word
+                      stopb :: StopBits,          -- ^ Number of stop bits
+                      parity :: Parity,           -- ^ Type of parity
+                      flowControl :: FlowControl, -- ^ Type of flowcontrol
+                      timeout :: Int              -- ^ Timeout when receiving a char in tenth of seconds
+                  }
+                      
+
+data SerialPort = SerialPort { 
+#if defined(mingw32_HOST_OS)
+                      handle :: HANDLE,
+#else
+                      fd :: Fd,
+#endif
+                      newSettings :: SerialPortSettings
+                  }
+
+
+-- | Most commonly used configuration
+--  
+--  - 9600 baud
+--
+--  - 8 data bits
+--
+--  - 1 stop bit
+--
+--  - no parity
+--
+--  - no flow control
+--
+--  - 0.1 millisecond receive timeout
+--
+defaultSerialSettings :: SerialPortSettings
+defaultSerialSettings =
+  SerialPortSettings CS9600 8 One NoParity NoFlowControl 1
+
diff --git a/serialport.cabal b/serialport.cabal
--- a/serialport.cabal
+++ b/serialport.cabal
@@ -1,5 +1,5 @@
 Name:           serialport
-Version:        0.4.0
+Version:        0.4.0.1
 Cabal-Version:  >= 1.6
 Build-Type:     Custom
 license:        BSD3
@@ -19,6 +19,7 @@
 
 Library
   Exposed-Modules:    System.Hardware.Serialport
+                      System.Hardware.Serialport.Types
   Build-Depends:      base >= 4, base < 5 
   ghc-options:        -Wall