diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index 13159d6e95d2..fcf795032659 100644
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -604,7 +604,7 @@ dnl  XSL_STYLE_DIR
 dnl
 AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
 
-glibcxx_docbook_url=http://docbook.sourceforge.net/release/xsl-ns/current/
+glibcxx_docbook_url=http://cdn.docbook.org/release/xsl/current/
 
 AC_MSG_CHECKING([for local stylesheet directory])
 glibcxx_local_stylesheets=no
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 51c1d493ac9e..7230911bacc8 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -74178,7 +74178,7 @@ fi
 
 
 
-glibcxx_docbook_url=http://docbook.sourceforge.net/release/xsl-ns/current/
+glibcxx_docbook_url=http://cdn.docbook.org/release/xsl/current/
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for local stylesheet directory" >&5
 $as_echo_n "checking for local stylesheet directory... " >&6; }