diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index c3692296359..f77673791b9 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1058,7 +1058,6 @@ set semsys:seminfo_semmsl=32
       <term><systemitem class="osname">Solaris</> 2.10 (Solaris
       10)</term>
       <term><systemitem class="osname">OpenSolaris</></term>
-      <indexterm><primary>Solaris</><secondary>IPC configuration</></>
       <listitem>
        <para>
         In Solaris 10 and OpenSolaris, the default shared memory and