diff --git a/mail/config/mail-jar.mn b/mail/config/mail-jar.mn
index 50da57d70b9..560a7d714ab 100644
--- a/mail/config/mail-jar.mn
+++ b/mail/config/mail-jar.mn
@@ -79,6 +79,7 @@ content/communicator/pref/pref.xul,                   comm/content/communicator/
 content/communicator/pref/nsPrefWindow.js,            comm/content/communicator/pref/nsPrefWindow.js
 content/communicator/pref/pref-applications-edit.xul, comm/content/communicator/pref/pref-applications-edit.xul
 content/communicator/pref/pref-applications-edit.js,  comm/content/communicator/pref/pref-applications-edit.js
+content/communicator/pref/pref-calibrate-screen.xul,  comm/content/communicator/pref/pref-calibrate-screen.xul
 
 # dummy contextHelp.js file so we don't get a bunch of errors about this file not being found
 content/help/contextHelp.js,                          comm/content/help/contextHelp.js