--- a/m4/jm-winsz1.m4
+++ b/m4/jm-winsz1.m4
@@ -1,5 +1,5 @@
 dnl From Jim Meyering.
-#serial 2
+#serial 3
 AC_DEFUN(jm_HEADER_TIOCGWINSZ_IN_TERMIOS_H,
 [AC_REQUIRE([AM_SYS_POSIX_TERMIOS])
  AC_CACHE_CHECK([whether use of TIOCGWINSZ requires termios.h],
@@ -21,6 +21,6 @@
 AC_DEFUN(jm_WINSIZE_IN_PTEM,
   [AC_CHECK_HEADER([sys/ptem.h],
 		   AC_DEFINE(WINSIZE_IN_PTEM, 1,
-      [Define if your system defines \`struct winsize' in sys/ptem.h.]))
+      [Define if your system defines `struct winsize' in sys/ptem.h.]))
   ]
 )

--- a/m4/ls-mntd-fs.m4
+++ b/m4/ls-mntd-fs.m4
@@ -1,4 +1,4 @@
-#serial 2
+#serial 3
 
 dnl From Jim Meyering.
 dnl
@@ -11,6 +11,8 @@
 dnl for all uses of $ac_cv_func_* and $ac_cv_header_* variables below.
 dnl
 
+AC_PREREQ(2.14a)
+
 AC_DEFUN(jm_LIST_MOUNTED_FILESYSTEMS,
   [
 # Determine how to get the list of mounted filesystems.
@@ -130,7 +132,7 @@
     AC_DEFINE(MOUNTED_VMOUNT, 1,
 	[Define if there is a function named mntctl that can be used to read
    the list of mounted filesystems, and there is a system header file
-   that declares \`struct vmount.'  (AIX)])
+   that declares `struct vmount.'  (AIX)])
   fi
 fi
 

--- a/m4/uintmax_t.m4
+++ b/m4/uintmax_t.m4
@@ -1,8 +1,8 @@
-#serial 3
+#serial 4
 
 dnl From Paul Eggert.
 
-AC_PREREQ(2.13)
+AC_PREREQ(2.14a)
 
 # Define uintmax_t to `unsigned long' or `unsigned long long'
 # if <inttypes.h> does not exist.
@@ -16,7 +16,7 @@
       && ac_type='unsigned long long' \
       || ac_type='unsigned long'
     AC_DEFINE_UNQUOTED(uintmax_t, $ac_type,
-[  Define to \`unsigned long' or \`unsigned long long'
+[  Define to `unsigned long' or `unsigned long long'
    if <inttypes.h> doesn't define.])
   fi
 ])