diff --git a/ChangeLog b/ChangeLog
index f039295287..7a4ba76a47 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Nov 15 14:29:56 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* common.mk (prereq): added auto generated sources.  [ruby-dev:32280]
+
 Thu Nov 15 12:31:13 2007  Tanaka Akira  <akr@fsij.org>
 
 	* tool/compile_prelude.rb: use constant for prefix.
diff --git a/common.mk b/common.mk
index aa0ba11a63..9b806f4a48 100644
--- a/common.mk
+++ b/common.mk
@@ -642,11 +642,14 @@ miniprelude.c: $(srcdir)/tool/compile_prelude.rb $(srcdir)/prelude.rb
 prelude.c: $(srcdir)/tool/compile_prelude.rb $(srcdir)/prelude.rb $(srcdir)/gem_prelude.rb $(RBCONFIG)
 	$(MINIRUBY) -I$(srcdir) -rrbconfig $(srcdir)/tool/compile_prelude.rb $(srcdir)/prelude.rb $(srcdir)/gem_prelude.rb $@
 
-prereq: incs {$(VPATH)}miniprelude.c
+prereq: incs {$(VPATH)}parse.c $(srcdir)/ext/ripper/ripper.c {$(VPATH)}miniprelude.c
 
 docs:
 	$(BASERUBY) -I$(srcdir) $(srcdir)/tool/makedocs.rb $(INSNS2VMOPT)
 
+$(srcdir)/ext/ripper/ripper.c:
+	cd ext/ripper && exec $(MAKE) -f depend top_srcdir=../.. srcdir=.
+
 ##
 
 run: miniruby$(EXEEXT) PHONY