diff --git a/ChangeLog b/ChangeLog
index 10b6d0259c..ed1857f98e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,9 @@
-Tue Jan 29 00:52:14 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Tue Jan 29 01:26:23 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* common.mk (up): use last changed revision.
 
+	* common.mk (up): force to update revision.h.
+
 Tue Jan 29 00:12:17 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* bignum.c (rb_big2str0): should be US-ASCII.
diff --git a/common.mk b/common.mk
index bc78909c34..f22781c8e9 100644
--- a/common.mk
+++ b/common.mk
@@ -726,7 +726,7 @@ PRELUDES = prelude.c miniprelude.c golf_prelude.c
 docs:
 	$(BASERUBY) -I$(srcdir) $(srcdir)/tool/makedocs.rb $(INSNS2VMOPT)
 
-$(srcdir)/revision.h:
+$(srcdir)/revision.h: $(REVISION_FORCE)
 	@set LC_MESSAGES=C
 	-@$(SET_LC_MESSAGES) $(VCS) info "$(@D)" | \
 	sed -n "s/.*Rev:/#define RUBY_REVISION/p" > "$@.tmp"
@@ -796,7 +796,7 @@ dist: $(PROGRAM)
 
 up:
 	@$(VCS) up "$(srcdir)"
-	-@$(MAKE) $(MFLAGS) "$(srcdir)/revision.h"
+	-@$(MAKE) $(MFLAGS) REVISION_FORCE=PHONY "$(srcdir)/revision.h"
 
 help:
 	@echo "                Makefile of Ruby"