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-rw-r--r--libstdc++-v3/doc/xml/manual/extensions.xml5
1 files changed, 4 insertions, 1 deletions
diff --git a/libstdc++-v3/doc/xml/manual/extensions.xml b/libstdc++-v3/doc/xml/manual/extensions.xml
index 52cebab2ca1..0aa28c7103a 100644
--- a/libstdc++-v3/doc/xml/manual/extensions.xml
+++ b/libstdc++-v3/doc/xml/manual/extensions.xml
@@ -17,7 +17,10 @@
</keywordset>
</partinfo>
-<title>Extensions</title>
+<title>
+ Extensions
+ <indexterm><primary>Extensions</primary></indexterm>
+</title>
<preface>
<title></title>