diff --git a/com.cabal b/com.cabal
--- a/com.cabal
+++ b/com.cabal
@@ -1,5 +1,5 @@
 Name: com
-version: 1.2.3
+version: 1.2.3.1
 Synopsis: Haskell COM support library
 Description: 
    Supporting for writing COM\/Automation clients in Haskell, and for
@@ -76,7 +76,7 @@
  GHC-Options: -fglasgow-exts -fvia-C 
 -- I can't seem to feed this into the 'ld' invocation that creates the
 -- relocatable object file.
- Ld-options: --enable-stdcall-fixup --disable-stdcall-fixup
+-- Ld-options: --enable-stdcall-fixup --disable-stdcall-fixup
  Extensions: CPP
 
  Build-depends: old-time
diff --git a/include/WideStringSrc.h b/include/WideStringSrc.h
--- a/include/WideStringSrc.h
+++ b/include/WideStringSrc.h
@@ -3,6 +3,8 @@
 #define __WIDESTRING_H__
 
 #ifndef WCHAR
+/* I don't know why require this header now. */
+#include <wchar.h>
 #define WCHAR wchar_t
 #endif