diff --git a/ChangeLog b/ChangeLog
index b8229f1590..e8f27613ad 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Jan 14 23:28:10 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* win32/enc-setup.mak (BUILTIN_ENCOBJS): depends on enc/Makefile.in.
+
 Mon Jan 14 22:48:16 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* re.c (rb_char_to_option_kcode): use rb_enc_find_index() instead
diff --git a/win32/enc-setup.mak b/win32/enc-setup.mak
index 595716a5d6..2b51c4bf66 100644
--- a/win32/enc-setup.mak
+++ b/win32/enc-setup.mak
@@ -2,5 +2,5 @@ BUILTIN_ENCOBJS:
 
 !include $(srcdir)/enc/Makefile.in
 
-BUILTIN_ENCOBJS:
+BUILTIN_ENCOBJS: $(srcdir)/enc/Makefile.in
 	@echo BUILTIN_ENCOBJS = $(BUILTIN_ENCS:.c=.obj) >> $(MAKEFILE)