diff --git a/ChangeLog b/ChangeLog
index 5a1de3f5ce..2a595394db 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Feb  2 17:23:14 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* cygwin/GNUmakefile.in (dir.o, win32.o): depend on win32/dir.h.
+
 Mon Feb  2 17:13:46 2009  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* mkconfig.rb: patchlevel is somtimes minus.
diff --git a/cygwin/GNUmakefile.in b/cygwin/GNUmakefile.in
index fd9aa79214..f04489603e 100644
--- a/cygwin/GNUmakefile.in
+++ b/cygwin/GNUmakefile.in
@@ -63,6 +63,8 @@ GNUmakefile:	$(srcdir)/cygwin/GNUmakefile.in
 
 ifeq (@target_os@,mingw32)
 $(OBJS) $(MAINOBJ): win32.h
+
+dir.$(OBJEXT) win32.$(OBJEXT): win32/dir.h
 endif
 
 $(LIBRUBY_SO): $(RUBYDEF)