diff --git a/Control/Concurrent/Lifted.hs b/Control/Concurrent/Lifted.hs
--- a/Control/Concurrent/Lifted.hs
+++ b/Control/Concurrent/Lifted.hs
@@ -55,9 +55,9 @@
       -- * Communication abstractions
     , module Control.Concurrent.MVar.Lifted
     , module Control.Concurrent.Chan.Lifted
-#if !MIN_VERSION_base(4,6,0)
     , module Control.Concurrent.QSem.Lifted
     , module Control.Concurrent.QSemN.Lifted
+#if !MIN_VERSION_base(4,7,0)
     , module Control.Concurrent.SampleVar.Lifted
 #endif
 
@@ -115,9 +115,9 @@
 -- from lifted-base (this package):
 import Control.Concurrent.MVar.Lifted
 import Control.Concurrent.Chan.Lifted
-#if !MIN_VERSION_base(4,6,0)
 import Control.Concurrent.QSem.Lifted
 import Control.Concurrent.QSemN.Lifted
+#if !MIN_VERSION_base(4,7,0)
 import Control.Concurrent.SampleVar.Lifted
 #endif
 import Control.Exception.Lifted ( throwTo
diff --git a/Control/Concurrent/MVar/Lifted.hs b/Control/Concurrent/MVar/Lifted.hs
--- a/Control/Concurrent/MVar/Lifted.hs
+++ b/Control/Concurrent/MVar/Lifted.hs
@@ -42,6 +42,10 @@
 #else
     , addMVarFinalizer
 #endif
+#if MIN_VERSION_base(4,7,0)
+    , withMVarMasked
+    , tryReadMVar
+#endif
     ) where
 
 
@@ -220,4 +224,14 @@
 addMVarFinalizer :: MonadBaseControl IO m => MVar a -> m () -> m ()
 addMVarFinalizer = liftBaseDiscard . MVar.addMVarFinalizer
 {-# INLINABLE addMVarFinalizer #-}
+#endif
+
+#if MIN_VERSION_base (4,7,0)
+-- | Generalized version of 'MVar.withMVarMasked'.
+withMVarMasked :: MonadBaseControl IO m => MVar a -> (a -> m b) -> m b
+withMVarMasked = liftBaseOp . MVar.withMVarMasked
+
+-- | Generalized version of 'MVar.tryReadMVar'.
+tryReadMVar :: MonadBase IO m => MVar a -> m (Maybe a)
+tryReadMVar = liftBase . MVar.tryReadMVar
 #endif
diff --git a/Control/Concurrent/QSem/Lifted.hs b/Control/Concurrent/QSem/Lifted.hs
--- a/Control/Concurrent/QSem/Lifted.hs
+++ b/Control/Concurrent/QSem/Lifted.hs
@@ -1,3 +1,4 @@
+{-# OPTIONS_GHC -fno-warn-deprecations #-}
 {-# LANGUAGE CPP #-}
 {-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleContexts #-}
diff --git a/Control/Concurrent/QSemN/Lifted.hs b/Control/Concurrent/QSemN/Lifted.hs
--- a/Control/Concurrent/QSemN/Lifted.hs
+++ b/Control/Concurrent/QSemN/Lifted.hs
@@ -1,3 +1,4 @@
+{-# OPTIONS_GHC -fno-warn-deprecations #-}
 {-# LANGUAGE CPP #-}
 {-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleContexts #-}
diff --git a/lifted-base.cabal b/lifted-base.cabal
--- a/lifted-base.cabal
+++ b/lifted-base.cabal
@@ -1,5 +1,5 @@
 Name:                lifted-base
-Version:             0.2.2.2
+Version:             0.2.3.0
 Synopsis:            lifted IO operations from the base library
 License:             BSD3
 License-file:        LICENSE
@@ -37,14 +37,14 @@
   Exposed-modules: Control.Exception.Lifted
                    Control.Concurrent.MVar.Lifted
                    Control.Concurrent.Chan.Lifted
+                   Control.Concurrent.QSem.Lifted
+                   Control.Concurrent.QSemN.Lifted
                    Control.Concurrent.Lifted
                    Data.IORef.Lifted
                    Foreign.Marshal.Utils.Lifted
                    System.Timeout.Lifted
-  if impl(ghc < 7.6)
+  if impl(ghc < 7.8)
     Exposed-modules:
-                   Control.Concurrent.QSem.Lifted
-                   Control.Concurrent.QSemN.Lifted
                    Control.Concurrent.SampleVar.Lifted
 
   Build-depends: base                 >= 3     && < 5