diff --git a/ghc/lib/std/Directory.lhs b/ghc/lib/std/Directory.lhs
index f5f2611413fda43d59e19e9ed51918ce1d3d12ff..263aeca7e4d6134be7d36d3a66f9b09e137e8a8f 100644
--- a/ghc/lib/std/Directory.lhs
+++ b/ghc/lib/std/Directory.lhs
@@ -434,7 +434,7 @@ doesFileExist name = do
    (getFileStatus name >>= \ st -> return (not (isDirectory st)))
    (\ _ -> return False)
 
-foreign import ccall "libHS_cbits.so" "const_F_OK" const_F_OK  :: Int
+foreign import ccall "libHS_cbits.so" "const_F_OK" unsafe const_F_OK  :: Int
 
 #ifndef __HUGS__
 getModificationTime :: FilePath -> IO ClockTime
@@ -520,7 +520,7 @@ modificationTime stat = do
                   (# s3#, frozen# #) -> 
 			(# s3#, J# 1# 1# frozen# #)
 
-foreign import ccall "libHS_cbits.so" "set_stat_st_mtime" 
+foreign import ccall "libHS_cbits.so" "set_stat_st_mtime" unsafe
    setFileMode :: PrimMutableByteArray RealWorld -> FileStatus -> IO ()
 
 #endif
@@ -531,12 +531,13 @@ isDirectory stat = prim_S_ISDIR (fileMode stat) /= 0
 isRegularFile :: FileStatus -> Bool
 isRegularFile stat = prim_S_ISREG (fileMode stat) /= 0
 
-foreign import ccall "libHS_cbits.so" "sizeof_stat" sizeof_stat :: Int
-foreign import ccall "libHS_cbits.so" "prim_stat"   primStat :: PrimByteArray -> PrimMutableByteArray RealWorld -> IO Int
+foreign import ccall "libHS_cbits.so" "sizeof_stat" unsafe sizeof_stat :: Int
+foreign import ccall "libHS_cbits.so" "prim_stat"   unsafe
+  primStat :: PrimByteArray -> PrimMutableByteArray RealWorld -> IO Int
 
-foreign import ccall "libHS_cbits.so" "get_stat_st_mode" fileMode     :: FileStatus -> FileMode
-foreign import ccall "libHS_cbits.so" "prim_S_ISDIR"     prim_S_ISDIR :: FileMode -> Int
-foreign import ccall "libHS_cbits.so" "prim_S_ISREG"     prim_S_ISREG :: FileMode -> Int
+foreign import ccall "libHS_cbits.so" "get_stat_st_mode" unsafe fileMode     :: FileStatus -> FileMode
+foreign import ccall "libHS_cbits.so" "prim_S_ISDIR"     unsafe prim_S_ISDIR :: FileMode -> Int
+foreign import ccall "libHS_cbits.so" "prim_S_ISREG"     unsafe prim_S_ISREG :: FileMode -> Int
 \end{code}
 
 \begin{code}
@@ -586,18 +587,18 @@ primNewByteArray :: Int -> IO (PrimMutableByteArray s)
 primNewByteArray sz_in_bytes = stToIO (newCharArray (0,sz_in_bytes))
 #endif
 
-foreign import ccall "libHS_cbits.so" "createDirectory"  	primCreateDirectory     :: CString -> IO Int
-foreign import ccall "libHS_cbits.so" "removeDirectory"  	primRemoveDirectory     :: CString -> IO Int
-foreign import ccall "libHS_cbits.so" "removeFile"       	primRemoveFile          :: CString -> IO Int
-foreign import ccall "libHS_cbits.so" "renameDirectory"  	primRenameDirectory     :: CString -> CString -> IO Int
-foreign import ccall "libHS_cbits.so" "renameFile"       	primRenameFile          :: CString -> CString -> IO Int
-foreign import ccall "libHS_cbits.so" "openDir__"        	primOpenDir     	:: CString -> IO Addr
-foreign import ccall "libHS_cbits.so" "readDir__"        	primReadDir     	:: Addr -> IO Addr
-foreign import ccall "libHS_cbits.so" "get_dirent_d_name"   primGetDirentDName      :: Addr -> IO Addr
-foreign import ccall "libHS_cbits.so" "setCurrentDirectory" primSetCurrentDirectory :: CString -> IO Int
-foreign import ccall "libHS_cbits.so" "getCurrentDirectory" primGetCurrentDirectory :: IO Addr
-foreign import ccall "libc.so.6"        "free"                primFree                :: Addr -> IO ()
-foreign import ccall "libc.so.6"        "malloc"              primMalloc              :: Word -> IO Addr
-foreign import ccall "libc.so.6"        "chmod"               primChmod               :: CString -> Word -> IO Int
+foreign import ccall "libHS_cbits.so" "createDirectory"  	unsafe primCreateDirectory     :: CString -> IO Int
+foreign import ccall "libHS_cbits.so" "removeDirectory"  	unsafe primRemoveDirectory     :: CString -> IO Int
+foreign import ccall "libHS_cbits.so" "removeFile"       	unsafe primRemoveFile          :: CString -> IO Int
+foreign import ccall "libHS_cbits.so" "renameDirectory"  	unsafe primRenameDirectory     :: CString -> CString -> IO Int
+foreign import ccall "libHS_cbits.so" "renameFile"       	unsafe primRenameFile          :: CString -> CString -> IO Int
+foreign import ccall "libHS_cbits.so" "openDir__"        	unsafe primOpenDir     	:: CString -> IO Addr
+foreign import ccall "libHS_cbits.so" "readDir__"        	unsafe primReadDir     	:: Addr -> IO Addr
+foreign import ccall "libHS_cbits.so" "get_dirent_d_name"   unsafe primGetDirentDName      :: Addr -> IO Addr
+foreign import ccall "libHS_cbits.so" "setCurrentDirectory" unsafe primSetCurrentDirectory :: CString -> IO Int
+foreign import ccall "libHS_cbits.so" "getCurrentDirectory" unsafe primGetCurrentDirectory :: IO Addr
+foreign import ccall "libc.so.6"        "free"                unsafe primFree                :: Addr -> IO ()
+foreign import ccall "libc.so.6"        "malloc"              unsafe primMalloc              :: Word -> IO Addr
+foreign import ccall "libc.so.6"        "chmod"               unsafe primChmod               :: CString -> Word -> IO Int
 \end{code}