diff --git a/reference/pgsql/functions/pg-query-params.xml b/reference/pgsql/functions/pg-query-params.xml
index 1698bd07df..3a77a85df4 100644
--- a/reference/pgsql/functions/pg-query-params.xml
+++ b/reference/pgsql/functions/pg-query-params.xml
@@ -27,10 +27,12 @@
     higher connections; it will fail when using earlier versions.
   </para>
   <para>
-    If parameters are used, they are referred to in the <parameter>query</parameter> 
-    string as $1, $2, etc.  <parameter>params</parameter> specifies the actual values of the 
-    parameters. A &null; value in this array means the corresponding parameter is SQL
-    <literal>NULL</literal>.
+    If parameters are used, they are referred to in the
+    <parameter>query</parameter> string as $1, $2, etc. The same parameter may
+    appear more than once in the <parameter>query</parameter>; the same value
+    will be used in that case. <parameter>params</parameter> specifies the
+    actual values of the parameters. A &null; value in this array means the
+    corresponding parameter is SQL <literal>NULL</literal>.
   </para>
   <para>
     The primary advantage of <function>pg_query_params</function> over <function>pg_query</function>