diff --git a/reference/openssl/reference.xml b/reference/openssl/reference.xml
index cb6d4aa8ea..55e233e945 100644
--- a/reference/openssl/reference.xml
+++ b/reference/openssl/reference.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.9 $ -->
+<!-- $Revision: 1.10 $ -->
  <reference id="ref.openssl">
   <title>OpenSSL Functions</title>
   <titleabbrev>OpenSSL</titleabbrev>
@@ -24,6 +24,12 @@
      Other versions (PHP &lt;=4.0.4pl1 and &gt;= 4.3.2) require OpenSSL &gt;=
      0.9.6.
     </para>
+    <warning>
+     <para>
+      You are strongly encouraged to use the most recent OpenSSL version,
+      otherwise your web server could be vulnerable to attack.
+     </para>
+    </warning>
    </section>
 
    &reference.openssl.configure;