diff --git a/reference/oci8/setup.xml b/reference/oci8/setup.xml
index 9c58b15af4..f173fc0788 100644
--- a/reference/oci8/setup.xml
+++ b/reference/oci8/setup.xml
@@ -22,8 +22,10 @@
    package.
   </para>
   <para>
-   On Windows, OCI8 needs client libraries from version 10gR2 or
-   greater.  With some versions of Instant Client you may additionally
+   On Windows, the php_oci8 DLL needs client libraries from version 10gR2 or greater.  
+   In PHP 5.3 up to and including PHP 5.3.5, the php_oci8_11g DLL requires Oracle 11gR1 or greater client libraries.
+   From PHP 5.3.6 the php_oci8_11g DLL requires Oracle 11gR2 or greater client libraries.
+   With some versions of Instant Client you may additionally
    need <filename>mfc71.dll</filename>
    and <filename>msvcr71.dll</filename> libraries.
   </para>