diff --git a/m4/Makefile.am b/m4/Makefile.am
index efb32b83..4948ae9c 100644
--- a/m4/Makefile.am
+++ b/m4/Makefile.am
@@ -4,15 +4,20 @@ EXTRA_DIST = \
 c-bs-a.m4 \
 ccstdc.m4 \
 check-decl.m4 \
+codeset.m4 \
 d-ino.m4 \
 decl.m4 \
 error.m4 \
 fnmatch.m4 \
 getline.m4 \
 gettext.m4 \
+glibc21.m4 \
+iconv.m4 \
+inttypes.m4 \
 isc-posix.m4 \
 jm-mktime.m4 \
 lcmessage.m4 \
+longlong.m4 \
 malloc.m4 \
 mbrtowc.m4 \
 mbstate_t.m4 \
@@ -25,4 +30,5 @@ ulonglong.m4 \
 utimbuf.m4 \
 utime.m4 \
 utimes.m4 \
+xstrtoimax.m4 \
 xstrtoumax.m4