diff --git a/extension/install.rdf b/extension/install.rdf
index a95e0e3..1f977a5 100644
--- a/extension/install.rdf
+++ b/extension/install.rdf
@@ -9,6 +9,7 @@
     <em:id>{8620c15f-30dc-4dba-a131-7c5d20cf4a29}</em:id>
     <em:version>3.10pre</em:version>
     <em:type>2</em:type>
+    <em:multiprocessCompatible>true</em:multiprocessCompatible>
 
     <!-- Front End MetaData -->
     <em:name>Nightly Tester Tools</em:name>