diff -Nur mozilla-2.0.orig//browser/installer/Makefile.in mozilla-2.0/browser/installer/Makefile.in
--- mozilla-2.0.orig//browser/installer/Makefile.in	2011-03-03 14:11:20.000000000 -0800
+++ mozilla-2.0/browser/installer/Makefile.in	2011-03-13 10:08:45.896702838 -0700
@@ -43,6 +43,8 @@
 
 include $(DEPTH)/config/autoconf.mk
 
+MOZ_APP_VERSION="4.0"
+
 include $(topsrcdir)/config/rules.mk
 
 MOZ_PKG_REMOVALS = $(srcdir)/removed-files.in
