diff --git a/ChangeLog b/ChangeLog
index 70fb5365da..e9835f94c3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sat Aug  9 21:29:45 2008  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* common.mk: encs depend on transdb.h
+
 Sat Aug  9 21:10:51 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* configure.in (rb_cv_rshift_sign, rb_cv_binary_elf): get rid of
diff --git a/common.mk b/common.mk
index a8825733a5..5b9f271c14 100644
--- a/common.mk
+++ b/common.mk
@@ -376,7 +376,7 @@ $(RBCONFIG): $(srcdir)/mkconfig.rb config.status $(PREP)
 		-install_name=$(RUBY_INSTALL_NAME) \
 		-so_name=$(RUBY_SO_NAME) rbconfig.rb
 
-encs: enc.mk $(LIBRUBY) $(PREP)
+encs: enc.mk $(LIBRUBY) $(PREP) transdb.h
 	$(MAKE) -f enc.mk MINIRUBY="$(MINIRUBY)" $(MFLAGS)
 
 enc.mk: $(srcdir)/enc/make_encmake.rb $(srcdir)/enc/Makefile.in $(srcdir)/enc/depend \