diff --git a/developers.html b/developers.html
index 0cfa91350dd1310ce79e4c6bf78d859c378446b1..139dd3d426d66b8e4f939e98828de2f404082757 100644
--- a/developers.html
+++ b/developers.html
@@ -1591,6 +1591,13 @@ need to be connected to the NPS intranet.
               <br />
               &nbsp;&nbsp;&nbsp;&nbsp;<code style="color:darkgreen"><b>-J-Djavax.xml.bind.context.factory=com.sun.xml.bind.v2.ContextFactory</b></code>
           </li>
+          <li>
+              <i>Tomcat supportu under Netbeans 12.3 and OpenJDK 16.</i> 
+              Append the following property to
+              <code>netbeans_default_options</code> environment variable:
+              <br />
+              &nbsp;&nbsp;&nbsp;&nbsp;<code style="color:darkgreen"><b>-J--add-exports=java.xml/com.sun.org.apache.xerces.internal.impl.dv.util=ALL-UNNAMED</b></code>
+          </li>
           <li>
               <i>(Prior problem,
               <a href="https://netbeans.apache.org/download/nb113/index.html#_hidpi">fixed</a> under NetBeans 11.3)</i>.