diff --git a/ChangeLog b/ChangeLog
index 2ce108cd57..7d07041b6b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Jan 15 13:43:18 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* common.mk (us_ascii.o): add dependecies. [ruby-dev:33111]
+
 Tue Jan 15 03:41:42 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* eval.c (eval): check if backtrace is empty.  [ruby-core:15040]
diff --git a/common.mk b/common.mk
index 0b95780aab..a2cb21c39a 100644
--- a/common.mk
+++ b/common.mk
@@ -663,6 +663,8 @@ goruby.$(OBJEXT): {$(VPATH)}goruby.c {$(VPATH)}main.c {$(VPATH)}ruby.h \
 
 ascii.$(OBJEXT): {$(VPATH)}ascii.c {$(VPATH)}regenc.h {$(VPATH)}config.h \
   {$(VPATH)}defines.h {$(VPATH)}oniguruma.h
+us_ascii.$(OBJEXT): {$(VPATH)}us_ascii.c {$(VPATH)}regenc.h {$(VPATH)}config.h \
+  {$(VPATH)}defines.h {$(VPATH)}oniguruma.h
 unicode.$(OBJEXT): {$(VPATH)}unicode.c {$(VPATH)}regint.h \
   {$(VPATH)}config.h {$(VPATH)}defines.h {$(VPATH)}regenc.h \
   {$(VPATH)}oniguruma.h {$(VPATH)}st.h