diff --git a/reference/strings/functions/trim.xml b/reference/strings/functions/trim.xml
index 43d3ee1152..e7beafd08f 100644
--- a/reference/strings/functions/trim.xml
+++ b/reference/strings/functions/trim.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.3 $ -->
+<!-- $Revision: 1.4 $ -->
 <!-- splitted from ./en/functions/strings.xml, last change in rev 1.2 -->
   <refentry id="function.trim">
    <refnamediv>
@@ -84,7 +84,7 @@ $trimmed = trim($text);
 // $trimmed = "These are a few words :) ..."
 $trimmed = trim($text, " \t.");
 // $trimmed = "These are a few words :)"
-$clean = trim($binary, "\0x00..\0x1F");
+$clean = trim($binary, "\x00..\x1F");
 // trim the ASCII control characters at the beginning and end of $binary
 // (from 0 to 31 inclusive)