diff --git a/Makefile.am b/Makefile.am
index f1e842a320d8cd756dc40df7c28c4fa4f0006c85..a6bc79bd4788e895bdc4bf9309c145ba69a83c81 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2,7 +2,7 @@ SUBDIRS = gnu-compat alberta_util alberta add_ons
 
 ACLOCAL_AMFLAGS  = -I ./m4
 
-EXTRA_DIST = gen-assemble-fcts.sh
+EXTRA_DIST = gen-assemble-fcts.sh mkdoffreemasks.sh
 
 #
 # install the libtool-script in the libexecdir s.t. Makefile.alberta