diff --git a/configure.ac b/configure.ac
index 45f271c..2df2ca1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,8 +1,8 @@
 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.
 
-AC_PREREQ(2.61)
-AC_INIT(hdapsd, 20141203, https://github.com/linux-thinkpad/hdapsd)
+AC_PREREQ([2.71])
+AC_INIT([hdapsd],[20141203],[https://github.com/linux-thinkpad/hdapsd])
 AM_INIT_AUTOMAKE([foreign])
 AC_CONFIG_SRCDIR([src/hdapsd.c])
 AC_CONFIG_HEADERS([src/config.h])
@@ -19,15 +19,12 @@ AC_PROG_CC
 # Checks for libraries.
 
 # Checks for header files.
-AC_HEADER_STDC
 AC_CHECK_HEADERS([fcntl.h stdlib.h string.h sys/time.h unistd.h syslog.h linux/input.h dirent.h])
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
-AC_HEADER_TIME
 
 # Checks for library functions.
-AC_TYPE_SIGNAL
 AC_CHECK_FUNCS([gettimeofday strerror uname])
 
 # check for systemd