diff --git a/mozilla/network/protocol/mailbox/Makefile.in b/mozilla/network/protocol/mailbox/Makefile.in
index c775032d9c9..59c6f5142cc 100644
--- a/mozilla/network/protocol/mailbox/Makefile.in
+++ b/mozilla/network/protocol/mailbox/Makefile.in
@@ -25,12 +25,16 @@ include $(DEPTH)/config/autoconf.mk
 MODULE		= mailbxurl
 LIBRARY_NAME	= mailbxurl
 
+include $(topsrcdir)/config/config.mk
+
 CSRCS		= \
 	mkmailbx.c	\
 	$(NULL)
 
 EXPORTS= $(srcdir)/mkmailbx.h
 
+LOCAL_INCLUDES := -I$(topsrcdir)/network/protocol/imap4
+
 REQUIRES	= imap4url netcache network dbm util pref js java fileurl \
 	security layer img httpurl mimetype htmldlgs