diff --git a/Text/Show/ByteString/Integer.hs b/Text/Show/ByteString/Integer.hs
--- a/Text/Show/ByteString/Integer.hs
+++ b/Text/Show/ByteString/Integer.hs
@@ -16,11 +16,12 @@
 
 import GHC.Base
 
-
-#if  __GLASGOW_HASKELL__ && __GLASGOW_HASKELL__ < 611
+#if   __GLASGOW_HASKELL__ && __GLASGOW_HASKELL__ <  611 && INTEGER_GMP
 import GHC.Integer.Internals
-#elif __GLASGOW_HASKELL__ && __GLASGOW_HASKELL__ >= 611
+#elif __GLASGOW_HASKELL__ && __GLASGOW_HASKELL__ >= 611 && INTEGER_GMP
 import GHC.Integer.GMP.Internals
+#elif __GLASGOW_HASKELL__ && INTEGER_SIMPLE
+import GHC.Integer.Simple.Internals
 #endif
 
 import GHC.Num
@@ -37,7 +38,12 @@
  where mi = fromIntegral (maxBound :: Int)
 
 showpInteger :: Integer -> Put
+#ifdef INTEGER_SIMPLE
+#elif INTEGER_GMP
 showpInteger (S# i#) = putI i#
+#else
+showpInteger (I# i#) = putI i#
+#endif
 showpInteger n
   | n < 0     = putAscii '-' >> posIntegerPut (-n)
   | otherwise = posIntegerPut n
@@ -56,7 +62,7 @@
 splith :: Integer -> [Integer] -> [Integer]
 splith _ [    ] = error "splith: the impossible happened."
 splith p (n:ns) = case n `quotRemInteger` p of
-#ifdef INTEGER_GMP
+#if defined(INTEGER_GMP) || defined(INTEGER_SIMPLE)
   (# q, r #) ->
 #else
   (q, r) -> 
@@ -68,7 +74,7 @@
 splitb :: Integer -> [Integer] -> [Integer]
 splitb _ [    ] = []
 splitb p (n:ns) = case n `quotRemInteger` p of
-#ifdef INTEGER_GMP
+#if defined(INTEGER_GMP) || defined(INTEGER_SIMPLE)
   (# q, r #) ->
 #else
   (q, r) ->
@@ -78,7 +84,7 @@
 printh :: [Integer] -> Put
 printh [    ] = error "printh: the impossible happened."
 printh (n:ns) = case n `quotRemInteger` mx of
-#ifdef INTEGER_GMP
+#if defined(INTEGER_GMP) || defined(INTEGER_SIMPLE)
   (# q', r' #) ->
 #else
   (q', r') ->
@@ -91,7 +97,7 @@
 printb :: [Integer] -> Put
 printb [    ] = return ()
 printb (n:ns) = case n `quotRemInteger` mx of
-#ifdef INTEGER_GMP
+#if defined(INTEGER_GMP) || defined(INTEGER_SIMPLE)
   (# q', r' #) ->
 #else
   (q', r') ->
diff --git a/bytestring-show.cabal b/bytestring-show.cabal
--- a/bytestring-show.cabal
+++ b/bytestring-show.cabal
@@ -1,5 +1,5 @@
 name:              bytestring-show
-version:           0.3.5.1
+version:           0.3.5.2
 license:           BSD3
 license-file:      LICENSE
 author:            Dan Doel
@@ -11,6 +11,10 @@
 build-type:        Simple
 cabal-version:     >= 1.2.3
 
+flag integer-simple
+        default: False
+        description: use with integer-simple build of GHC
+
 library
     build-depends: base < 5, binary < 0.6, bytestring >= 0.9 && <= 1, array < 0.5, containers < 0.5
 
@@ -35,11 +39,15 @@
     ghc-options:
         -O2 -Wall
 
-    if impl(ghc >= 6.11)
+    if flag(integer-simple)
+        cpp-options: -DINTEGER_SIMPLE
+        build-depends: integer-simple
+
+    if impl(ghc >= 6.11) && !flag(integer-simple)
         cpp-options: -DINTEGER_GMP
         build-depends: integer-gmp >= 0.2 && < 0.5
 
-    if impl(ghc >= 6.9) && impl(ghc < 6.11)
+    if impl(ghc >= 6.9) && impl(ghc < 6.11) && !flag(integer-simple)
         cpp-options: -DINTEGER_GMP
         build-depends: integer >= 0.1 && < 0.2