diff --git a/reference/strings/functions/strrpos.xml b/reference/strings/functions/strrpos.xml
index d24ce9338d..58605e2ef4 100644
--- a/reference/strings/functions/strrpos.xml
+++ b/reference/strings/functions/strrpos.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 1.8 -->
   <refentry id="function.strrpos">
    <refnamediv>
@@ -44,7 +44,7 @@ if ($pos === false) { // note: three equal signs
 
 // in versions older than 4.0b3:
 $pos = strrpos($mystring, "b");
-if (is_string($pos) && !$pos) {
+if (is_bool($pos) && !$pos) {
     // not found...
 }
 ?>