diff --git a/reference/strings/functions/ltrim.xml b/reference/strings/functions/ltrim.xml
index ab74787165..460e23603a 100644
--- a/reference/strings/functions/ltrim.xml
+++ b/reference/strings/functions/ltrim.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.ltrim">
    <refnamediv>
@@ -83,7 +83,7 @@ $trimmed = ltrim($text);
 // $trimmed = "These are a few words :) ...  "
 $trimmed = ltrim($text, " \t.");
 // $trimmed = "These are a few words :) ...  "
-$clean = ltrim($binary, "\0x00..\0x1F");
+$clean = ltrim($binary, "\x00..\x1F");
 // trim the ASCII control characters at the beginning of $binary 
 // (from 0 to 31 inclusive)
 
diff --git a/reference/strings/functions/rtrim.xml b/reference/strings/functions/rtrim.xml
index a34c4e0cdd..d4e73d0763 100644
--- a/reference/strings/functions/rtrim.xml
+++ b/reference/strings/functions/rtrim.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 1.31 -->
   <refentry id="function.rtrim">
    <refnamediv>
@@ -83,7 +83,7 @@ $trimmed = rtrim($text);
 // $trimmed = "\t\tThese are a few words :) ..."
 $trimmed = rtrim($text, " \t.");
 // $trimmed = "\t\tThese are a few words :)"
-$clean = rtrim($binary, "\0x00..\0x1F");
+$clean = rtrim($binary, "\x00..\x1F");
 // trim the ASCII control characters at the end of $binary 
 // (from 0 to 31 inclusive)