diff --git a/m4/Makefile.am b/m4/Makefile.am
index 33a874dd..2adcc08b 100644
--- a/m4/Makefile.am
+++ b/m4/Makefile.am
@@ -16,10 +16,15 @@
 
 include $(top_srcdir)/gtest.mk
 
-EXTRA_DIST = 		\
-	libtool.m4	\
-	ltoptions.m4	\
-	ltversion.m4  	\
-	lt~obsolete.m4	\
-	ltsugar.m4	\
+EXTRA_DIST =				\
+	ax_check_enable_debug.m4	\
+	ax_compiler_flags.m4		\
+	ax_compiler_flags_cflags.m4	\
+	ax_compiler_flags_cxxflags.m4	\
+	ax_is_release.m4		\
+	libtool.m4			\
+	ltoptions.m4			\
+	ltversion.m4			\
+	lt~obsolete.m4			\
+	ltsugar.m4			\
 	perlmod.m4