diff --git a/reference/ctype/reference.xml b/reference/ctype/reference.xml
index 182730fe26..ec76cd8279 100644
--- a/reference/ctype/reference.xml
+++ b/reference/ctype/reference.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.3 $ -->
+<!-- $Revision: 1.4 $ -->
  <reference id="ref.ctype">
   <title>Character type functions</title>
   <titleabbrev>ctype</titleabbrev>
@@ -20,7 +20,8 @@
      When called with a string argument they will check
      every character in the string and will only return
      &true; if every character in the string matches the
-     requested criteria.
+     requested criteria. When called with an empty string 
+     the result will always be &true;.
     </para>
     <para>
      Passing anything else but a string or integer will