diff --git a/hgraph.cabal b/hgraph.cabal
index e827e0f..62f183e 100644
--- a/hgraph.cabal
+++ b/hgraph.cabal
@@ -30,7 +30,11 @@ executable hgraph
                    DCB.DCB,
                    DCB.Structures,
                    DCB.IO
-    ghc-options: -Odph -rtsopts -threaded -fno-liberate-case -funfolding-use-threshold1000 -funfolding-keeness-factor1000 -optlo-O3 -fllvm
+    if os(windows) {
+        ghc-options: -Odph -rtsopts -threaded -fno-liberate-case -funfolding-use-threshold1000 -funfolding-keeness-factor1000 -optlo-O3
+	} else {
+        ghc-options: -Odph -rtsopts -threaded -fno-liberate-case -funfolding-use-threshold1000 -funfolding-keeness-factor1000 -optlo-O3 -fllvm
+	}
     extensions:    
                    BangPatterns, 
                    DoAndIfThenElse