diff --git a/reference/pgsql/functions/pg-result-error.xml b/reference/pgsql/functions/pg-result-error.xml
index f471e2778f..5776a4b692 100644
--- a/reference/pgsql/functions/pg-result-error.xml
+++ b/reference/pgsql/functions/pg-result-error.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.2 $ -->
+<!-- $Revision: 1.3 $ -->
 <!-- splitted from ./en/functions/pgsql.xml, last change in rev 1.82 -->
   <refentry id='function.pg-result-error'>
    <refnamediv>
@@ -20,6 +20,11 @@
      user has better chance to get better error message than
      <function>pg_last_error</function>.
     </para>
+    <para>
+     Because <function>pg_query</function> returns &false; if the query fails,
+     you must must use <function>pg_send_query</function> and
+     <function>pg_get_result</function> to get the result handle.
+    </para>
     <para>
      See also <function>pg_query</function>,
      <function>pg_send_query</function>,