diff --git a/mozilla/calendar/installer/Makefile.in b/mozilla/calendar/installer/Makefile.in
index 546e598a60e..ffb07fea039 100644
--- a/mozilla/calendar/installer/Makefile.in
+++ b/mozilla/calendar/installer/Makefile.in
@@ -78,9 +78,11 @@ MOZ_NONLOCALIZED_PKG_LIST = \
 MOZ_LOCALIZED_PKG_LIST = $(AB_CD)
 
 MOZ_OPTIONAL_PKG_LIST = \
-	adt \
-	talkback \
-	$(NULL)
+# adt = Additional Developer Tools (inspector)                                  
+#   adt \                                                                       
+# XXX Re-enable when we enable talkback for Sunbird                             
+#   talkback \                                                                  
+    $(NULL)                                                                     
 
 DEFINES += -DAB_CD=$(AB_CD)