diff --git a/doc/src/sgml/syntax.sgml b/doc/src/sgml/syntax.sgml
index 4ea667bd52f..40f722c18de 100644
--- a/doc/src/sgml/syntax.sgml
+++ b/doc/src/sgml/syntax.sgml
@@ -1697,9 +1697,6 @@ SELECT string_agg(a ORDER BY a, ',') FROM table;  -- incorrect
    </para>
 
    <para>
-    <indexterm>
-     <primary>median</primary>
-    </indexterm>
     <indexterm>
      <primary>median</primary>
      <seealso>percentile</seealso>