diff --git a/ChangeLog b/ChangeLog
index 56e29e0f15..1385d18fff 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Dec 10 01:28:16 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* common.mk (win32.obj): depend on headers.
+
 Tue Dec  9 18:35:35 2008  Martin Duerst  <duerst@it.aoyama.ac.jp>
 
 	* enc/trans/single_byte.trans, cp850-tbl.rb, cp852-tbl.rb,
diff --git a/common.mk b/common.mk
index ca4b6c60ae..78a9e00bc3 100644
--- a/common.mk
+++ b/common.mk
@@ -437,7 +437,7 @@ ia64.$(OBJEXT): {$(VPATH)}ia64.s
 
 # when I use -I., there is confliction at "OpenFile" 
 # so, set . into environment varible "include"
-win32.$(OBJEXT): {$(VPATH)}win32.c
+win32.$(OBJEXT): {$(VPATH)}win32.c $(RUBY_H_INCLUDES)
 
 ###