-AC_PATH_PROG([QUOTAON], [quotaon], [/usr/sbin/quotaon])
-AC_PATH_PROG([QUOTACHECK], [quotacheck], [/usr/sbin/quotacheck])
+AC_PATH_PROG([QUOTAON], [quotaon], [/usr/sbin/quotaon], [$PATH:/usr/sbin:/sbin])
+AC_PATH_PROG([QUOTACHECK], [quotacheck], [/usr/sbin/quotacheck], [$PATH:/usr/sbin:/sbin])