2 files changed, 5 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index 05bb6d55b2..8d839b0853 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Feb  7 11:46:59 2011  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* common.mk (rdoc): add --encoding=UTF-8; ruby's rdoc must be UTF-8.
+
 Mon Feb  7 10:21:50 2011  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* test/rdoc/test_rdoc_options.rb (TestRDocOptions#test_check_files):
diff --git a/common.mk b/common.mk
index 3987805fc2..7544f96f7e 100644
--- a/common.mk
+++ b/common.mk
@@ -387,7 +387,7 @@ post-install-doc::
 
 rdoc: PHONY main
 	@echo Generating RDoc documentation
-	$(Q) $(XRUBY) "$(srcdir)/bin/rdoc" --no-force-update --all --ri --op "$(RDOCOUT)" $(RDOCFLAGS) "$(srcdir)"
+	$(Q) $(XRUBY) "$(srcdir)/bin/rdoc" --encoding=UTF-8 --no-force-update --all --ri --op "$(RDOCOUT)" $(RDOCFLAGS) "$(srcdir)"
 nodoc: PHONY
 
 what-where-doc: no-install-doc