--- comm-1.9.1/mail/installer/Makefile.in.old	2010-01-20 14:27:43.000000000 +0100
+++ comm-1.9.1/mail/installer/Makefile.in	2010-01-20 14:29:21.000000000 +0100
@@ -42,6 +42,8 @@ VPATH		= @srcdir@
 
 include $(DEPTH)/config/autoconf.mk
 
+MOZ_APP_VERSION="__RPM_VERSION_INTERNAL__"
+
 NO_PKG_FILES = \
 	thunderbird-bin.elf \
 	thunderbird-config \