diff --git a/ChangeLog b/ChangeLog
index f4ff959c60..749761c8ee 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Feb 18 20:27:16 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in (OBJCOPY): set ac_cv_prog_ac_ct_OBJCOPY to do nothing
+	  on cygwin and mingw because symbols are exported by def file.
+
 Wed Feb 18 15:35:36 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* file.c (rb_file_chown): use chown unless HAVE_FCHOWN.
diff --git a/configure.in b/configure.in
index f8f2152206..7dda61dc71 100644
--- a/configure.in
+++ b/configure.in
@@ -242,7 +242,7 @@ AC_SUBST(ASFLAGS)
 
 case "$target_os" in
 when(cygwin*|mingw*)
-    ac_cv_prog_OBJCOPY=":";;
+    ac_cv_prog_ac_ct_OBJCOPY=":";;
 esac
 
 # BSD's ports and MacPorts prefix GNU binutils with 'g'