diff --git a/build-aux/Makefile.am b/build-aux/Makefile.am
index 0d4a725..6035450 100644
--- a/build-aux/Makefile.am
+++ b/build-aux/Makefile.am
@@ -27,4 +27,15 @@
 # along with this program.  If not, see http://www.gnu.org/licenses/.
 
 
-EXTRA_DIST = README bootstrap
+EXTRA_DIST = \
+	README			\
+	bootstrap		\
+	config.guess		\
+	config.sub		\
+	depcomp			\
+	install-sh		\
+	missing			\
+	snippet/arg-nonnull.h	\
+	snippet/c++defs.h	\
+	snippet/warn-on-use.h	\
+	snippet/_Noreturn.h
diff --git a/m4/Makefile.am b/m4/Makefile.am
index 0722768..82492df 100644
--- a/m4/Makefile.am
+++ b/m4/Makefile.am
@@ -27,7 +27,8 @@
 # along with this program.  If not, see http://www.gnu.org/licenses/.
 
 
-EXTRA_DIST = README \
+EXTRA_DIST = \
+	README			\
 	ax_append_flag.m4	\
 	ax_cflags_warn_all.m4	\
 	ax_c___attribute__.m4	\