diff --git a/reference/strings/functions/substr.xml b/reference/strings/functions/substr.xml
index 65f5157c39..019a63aeff 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: 1.8 $ -->
+<!-- $Revision: 1.9 $ -->
 <!-- splitted from ./en/functions/strings.xml, last change in rev 1.2 -->
   <refentry id="function.substr">
    <refnamediv>
@@ -68,8 +68,8 @@ $rest = substr("abcdef", -3, 1); // returns "d"
      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 <parameter>start</parameter> characters long, &false; will be
-     returned.
+     than or equal to <parameter>start</parameter> characters long, &false;
+     will be returned.
     </para>
     <para>
      If <parameter>length</parameter> is given and is negative, then that many
@@ -94,8 +94,11 @@ $rest = substr("abcdef", -3, -1); // returns "de"
     </example>
     <para>
      See also <function>strrchr</function>,
-     <function>substr_replace</function>, <function>ereg</function>,
-     <function>trim</function> and <function>mb_substr</function>.
+     <function>substr_replace</function>,
+     <function>ereg</function>,
+     <function>trim</function>,
+     <function>mb_substr</function> and
+     <function>wordwrap</function>.
     </para>
    </refsect1>
   </refentry>