diff --git a/src/Control/Concurrent/STM/Split/MVar.hs b/src/Control/Concurrent/STM/Split/MVar.hs
--- a/src/Control/Concurrent/STM/Split/MVar.hs
+++ b/src/Control/Concurrent/STM/Split/MVar.hs
@@ -6,8 +6,8 @@
    newEmpty,
    newIO,
    new,
-   take,
-   put,
+   take, tryTake,
+   put, tryPut,
 {-
    write,
    clear,
@@ -19,7 +19,7 @@
 import qualified Control.Concurrent.STM.TMVar as MVar
 import Control.Monad.STM (STM, )
 
-import Prelude (IO, return, )
+import Prelude (IO, Maybe, Bool, return, )
 
 
 newtype T dir a = Cons (MVar.TMVar a)
@@ -57,8 +57,14 @@
 take :: Out a -> STM a
 take (Cons v) = MVar.takeTMVar v
 
+tryTake :: Out a -> STM (Maybe a)
+tryTake (Cons v) = MVar.tryTakeTMVar v
+
 put :: In a -> a -> STM ()
 put (Cons v) a = MVar.putTMVar v a
+
+tryPut :: In a -> a -> STM Bool
+tryPut (Cons v) a = MVar.tryPutTMVar v a
 
 
 {-
diff --git a/stm-split.cabal b/stm-split.cabal
--- a/stm-split.cabal
+++ b/stm-split.cabal
@@ -1,5 +1,5 @@
 Name:             stm-split
-Version:          0.0.0.2
+Version:          0.0.1
 License:          BSD3
 License-File:     LICENSE
 Author:           Henning Thielemann <haskell@henning-thielemann.de>
@@ -27,7 +27,7 @@
 Cabal-Version:    >=1.6
 Build-Type:       Simple
 Source-Repository this
-  Tag:         0.0.0.2
+  Tag:         0.0.1
   Type:        darcs
   Location:    http://hub.darcs.net/thielema/stm-split/