diff --git a/mozilla/mailnews/mime/cthandlers/calendar/Makefile.in b/mozilla/mailnews/mime/cthandlers/calendar/Makefile.in
index 53dbb460e7b..753fb754803 100644
--- a/mozilla/mailnews/mime/cthandlers/calendar/Makefile.in
+++ b/mozilla/mailnews/mime/cthandlers/calendar/Makefile.in
@@ -20,6 +20,8 @@ topsrcdir	= @top_srcdir@
 VPATH		= @srcdir@
 srcdir		= @srcdir@
 
+IS_COMPONENT=1
+
 include $(DEPTH)/config/autoconf.mk
 
 MODULE=mimect-cal