diff --git a/System/Expect/ExpectBindings.hsc b/System/Expect/ExpectBindings.hsc
index 5367fea..57066fc 100644
--- a/System/Expect/ExpectBindings.hsc
+++ b/System/Expect/ExpectBindings.hsc
@@ -43,3 +43,9 @@ foreign import ccall "&" exp_loguser :: Ptr CInt
 
 foreign import ccall exp_popen :: CString -> IO (Ptr CFile)
 foreign import ccall exp_fexpectv :: Ptr CFile -> Ptr ExpCase -> IO CInt
+
+data TCL_Interp = TCL_Interp
+
+foreign import ccall "Tcl_Init" tcl_Init :: Ptr TCL_Interp -> IO ()
+foreign import ccall "Expect_Init" expect_Init :: Ptr TCL_Interp -> IO ()
+foreign import ccall "Tcl_CreateInterp" tcl_CreateInterp :: IO (Ptr TCL_Interp)
diff --git a/System/Expect/ExpectInterface.hs b/System/Expect/ExpectInterface.hs
index 39ee878..1b29c47 100644
--- a/System/Expect/ExpectInterface.hs
+++ b/System/Expect/ExpectInterface.hs
@@ -5,6 +5,7 @@ module System.Expect.ExpectInterface
   ({-- The contents of the binding that are to be further exposed --}
    ExpectType(ExpExact,ExpRegex,ExpGlob,ExpNull)
    {-- The custom interface --}
+  ,initExpect
   ,ExpectCase(ExpectCase,expectPattern,expectType,expectValue)
   ,ExpectProc(ExpectProc,expectHandle,expectFilePtr)
   ,muteExpect,unmuteExpect
@@ -40,6 +41,13 @@ data ExpectCase = ExpectCase { -- | Pattern to match against.
 			     , expectValue :: Int     
                              }
 
+-- | tcl and expect initialization.
+initExpect :: IO ()
+initExpect = do
+  interp <- tcl_CreateInterp
+  tcl_Init interp
+  expect_Init interp
+
 -- | Proc created by spawnExpect. Contains both the
 -- CFile pointer and a Haskell handle, so the
 -- translation needs only be done once.