diff --git a/reference/oci8/configure.xml b/reference/oci8/configure.xml
index ccd7c6c501..92ee9ab622 100644
--- a/reference/oci8/configure.xml
+++ b/reference/oci8/configure.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.2 $ -->
+<!-- $Revision: 1.3 $ -->
 <section id="oci8.installation">
  &reftitle.install;
  <para>
@@ -7,6 +7,12 @@
   <option role="configure">--with-oci8[=DIR]</option>, where DIR defaults to
   your environment variable ORACLE_HOME.
  </para>
+ <para>
+  If you're using Oracle Instant Client, you need to build PHP with the option 
+  <option role="configure">--with-oci8-instant-client[=DIR]</option>. Note
+  that Oracle Instant Client support first appeared in versions 4.3.11 and
+  5.0.4.
+ </para>
 </section>
 
 <!-- Keep this comment at the end of the file