--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -12,7 +12,8 @@
   canon-host.c closeout.c diacrit.c dirname.c exclude.c filemode.c \
   full-write.c getopt.c getopt1.c getstr.c getugroups.c hard-locale.c hash.c \
   human.c idcache.c isdir.c linebuffer.c localcharset.c long-options.c \
-  makepath.c md5.c memcasecmp.c memcoll.c modechange.c path-concat.c \
+  makepath.c mbswidth.c md5.c memcasecmp.c memcoll.c modechange.c \
+  path-concat.c \
   quote.c quotearg.c readtokens.c safe-read.c same.c save-cwd.c \
   savedir.c stripslash.c unicodeio.c userspec.c version-etc.c xgetcwd.c \
   xgethostname.c xmalloc.c xstrdup.c xstrtod.c xstrtol.c xstrtoul.c \
@@ -25,8 +26,8 @@
   argmatch.h backupfile.h bumpalloc.h closeout.h diacrit.h dirname.h error.h \
   exclude.h filemode.h fnmatch.h fsusage.h getdate.h getline.h getopt.h \
   getstr.h getpagesize.h group-member.h hard-locale.h hash.h human.h lchown.h \
-  linebuffer.h long-options.h md5.h memcasecmp.h memcoll.h \
-  makepath.h modechange.h mountlist.h nanosleep.h obstack.h \
+  linebuffer.h long-options.h mbswidth.h md5.h memcasecmp.h memcoll.h \
+  makepath.h mbswidth.h modechange.h mountlist.h nanosleep.h obstack.h \
   path-concat.h pathmax.h posixtm.h quote.h quotearg.h readtokens.h \
   readutmp.h regex.h safe-read.h same.h save-cwd.h savedir.h \
   strverscmp.h unicodeio.h version-etc.h xalloc.h xstrtod.h xstrtol.h