X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=System%2FMem%2FWeak.hs;h=61dce1d1fec85b4b7b4a07391c3088abe8e52dab;hb=774276311da000ed74092b910efb07df802b6a60;hp=208302f8fcf2bb443b9612e940c8ce7bf65307df;hpb=40fe562f6d01f6076bf00a267dd24f57b45a1933;p=ghc-base.git

diff --git a/System/Mem/Weak.hs b/System/Mem/Weak.hs
index 208302f..61dce1d 100644
--- a/System/Mem/Weak.hs
+++ b/System/Mem/Weak.hs
@@ -67,13 +67,16 @@ module System.Mem.Weak (
 	-- $precise
    ) where
 
-import Prelude
+import Data.Maybe (Maybe(..))
 
 #ifdef __HUGS__
 import Hugs.Weak
+import Prelude
 #endif
 
 #ifdef __GLASGOW_HASKELL__
+import GHC.Base (return)
+import GHC.Types (IO)
 import GHC.Weak
 #endif