diff --git a/doc/src/sgml/intarray.sgml b/doc/src/sgml/intarray.sgml
index fdeedc6409..3f7ee309e2 100644
--- a/doc/src/sgml/intarray.sgml
+++ b/doc/src/sgml/intarray.sgml
@@ -131,6 +131,11 @@
        </para>
        <para>
         Removes adjacent duplicates.
+        Often used with <function>sort</function> to remove all duplicates.
+       </para>
+       <para>
+        <literal>uniq('{1,2,2,3,1,1}'::integer[])</literal>
+        <returnvalue>{1,2,3,1}</returnvalue>
        </para>
        <para>
         <literal>uniq(sort('{1,2,3,2,1}'::integer[]))</literal>