diff --git a/language/types/string.xml b/language/types/string.xml
index a514d7023e..c11e77ea78 100644
--- a/language/types/string.xml
+++ b/language/types/string.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- $Revision: 1.19 $ -->
+<!-- $Revision: 1.20 $ -->
 <sect1 xml:id="language.types.string">
  <title>Strings</title>
 
@@ -797,9 +797,11 @@ $str[strlen($str)-1] = 'e';
   </simpara>
 
   <simpara>
-   The <type>string</type> will be evaluated as a <type>float</type> if it
-   contains any of the characters '.', 'e', or 'E'. Otherwise, it will be
-   evaluated as an <type>integer</type>.
+   If the <type>string</type> does not contain any of the characters '.', 'e',
+   or 'E' and implied numeric value fits into integer type limits (as defined by
+   <constant>PHP_INT_MAX</constant>), the <type>string</type> will be evaluated
+   as an <type>integer</type>. In all other cases it will be evaluated as a
+   <type>float</type>.
   </simpara>
 
   <para>