diff --git a/UI/MailPartViewers/product.plist b/UI/MailPartViewers/product.plist
index 7bebf273b..a042a538b 100644
--- a/UI/MailPartViewers/product.plist
+++ b/UI/MailPartViewers/product.plist
@@ -1,5 +1,5 @@
 {
-  requires = ( MAIN, MailerUI );
+  requires = ( MAIN );
 
   publicResources = (
   );
diff --git a/UI/MailerUI/product.plist b/UI/MailerUI/product.plist
index d8418c3a9..8a3b1331a 100644
--- a/UI/MailerUI/product.plist
+++ b/UI/MailerUI/product.plist
@@ -1,5 +1,5 @@
 { /* -*-javascript-*- */
-requires = ( MAIN, MainUI, CommonUI, Mailer ); /* , Sieve */
+requires = ( MAIN, MainUI, CommonUI, Mailer, MailPartViewers ); /* , Sieve */
 
    publicResources = (
       "uix.css",