diff --git a/reference/strings/functions/substr.xml b/reference/strings/functions/substr.xml
index 5716559d79..f16f7938eb 100644
--- a/reference/strings/functions/substr.xml
+++ b/reference/strings/functions/substr.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.17 $ -->
+<!-- $Revision: 1.18 $ -->
 <refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.substr">
  <refnamediv>
   <refname>substr</refname>
@@ -49,6 +49,10 @@
        will start at the <parameter>start</parameter>'th character
        from the end of <parameter>string</parameter>.
       </para>
+      <para>
+       If <parameter>string</parameter> is less than or equal to
+       <parameter>start</parameter> characters long, &false; will be returned.
+      </para>
       <para>
        <example>
         <title>Using a negative <parameter>start</parameter></title>
@@ -72,9 +76,7 @@ $rest = substr("abcdef", -3, 1); // returns "d"
        If <parameter>length</parameter> is given and is positive, the string
        returned will contain at most <parameter>length</parameter> characters
        beginning from <parameter>start</parameter> (depending on the length of
-       <parameter>string</parameter>). If <parameter>string</parameter> is less
-       than or equal to <parameter>start</parameter> characters long, &false;
-       will be returned.
+       <parameter>string</parameter>).
       </para>
       <para>
        If <parameter>length</parameter> is given and is negative, then that many