diff --git a/unix-time.cabal b/unix-time.cabal
--- a/unix-time.cabal
+++ b/unix-time.cabal
@@ -1,5 +1,5 @@
 Name:                   unix-time
-Version:                0.3.1
+Version:                0.3.2
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3
@@ -15,7 +15,8 @@
 Library
   Default-Language:     Haskell2010
   GHC-Options:          -Wall
-  CC-Options:           -fPIC
+  if impl(ghc >= 7.8)
+    CC-Options:         -fPIC
   Exposed-Modules:      Data.UnixTime
   Other-Modules:        Data.UnixTime.Conv
                         Data.UnixTime.Diff