diff --git a/ChangeLog b/ChangeLog
index 9aa50b1fd1..f6affcfdb8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Sep 15 04:25:03 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in (RDOCTARGET): use install-all.  [ruby-dev:39334]
+
 Tue Sep 15 03:00:35 2009  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* string.c (rb_str_lstrip_bang): use ascii_isspace().  [ruby-dev:39322]
diff --git a/configure.in b/configure.in
index 02e00282f1..0cc637dd83 100644
--- a/configure.in
+++ b/configure.in
@@ -2120,7 +2120,7 @@ AC_ARG_ENABLE(install-doc,
        AS_HELP_STRING([--disable-install-doc], [do not install rdoc indexes during install]),
        [install_doc=$enableval], [install_doc=yes])
 if test "$install_doc" != no; then
-    RDOCTARGET="rdoc"
+    RDOCTARGET="all"
 else
     RDOCTARGET="nodoc"
 fi