diff --git a/egison.cabal b/egison.cabal
--- a/egison.cabal
+++ b/egison.cabal
@@ -1,5 +1,5 @@
 Name:                egison
-Version:             2.1.7
+Version:             2.1.8
 Synopsis:            An Interpreter for the Programming Language Egison
 Description:         An interpreter for the programming language Egison.
                      A feature of Egison is the strong pattern match facility.
diff --git a/hs-src/Compiler/egisonc.hs b/hs-src/Compiler/egisonc.hs
--- a/hs-src/Compiler/egisonc.hs
+++ b/hs-src/Compiler/egisonc.hs
@@ -110,7 +110,7 @@
 compileHaskellFile filename = do
   let ghc = "ghc"
 --  compileStatus <- system $ ghc ++ " " ++ " -cpp --make -package ghc -fglasgow-exts -o " ++ filename ++ " _tmp.hs"
-  _ <- system $ ghc ++ "-O2 -o " ++ filename ++ " _tmp.hs"
+  _ <- system $ ghc ++ " -O2 -o " ++ filename ++ " _tmp.hs"
   removeFile "./_tmp.hs"
   removeFile "./_tmp.hi"
   removeFile "./_tmp.o"