diff --git a/CCache/configure.ac b/CCache/configure.ac
index 2559fdb5f..2db3553ce 100644
--- a/CCache/configure.ac
+++ b/CCache/configure.ac
@@ -1,7 +1,7 @@
 dnl Process this file with autoconf to produce a configure script.
 
 AC_INIT([ccache-swig],[0.0]) # Get version from SWIG in ccache_swig_config.h.in
-AC_PREREQ([2.71])
+AC_PREREQ([2.60])
 AC_CONFIG_SRCDIR([ccache.h])
 
 AC_MSG_NOTICE([Configuring ccache])
@@ -41,19 +41,6 @@ else
 fi
 
 AC_HEADER_DIRENT
-m4_warn([obsolete],
-[Update your code to rely only on HAVE_SYS_TIME_H,
-then remove this warning and the obsolete code below it.
-All current systems provide time.h; it need not be checked for.
-Not all systems provide sys/time.h, but those that do, all allow
-you to include it and time.h simultaneously.])dnl
-AC_CHECK_HEADERS_ONCE([sys/time.h])
-# Obsolete code to be removed.
-if test $ac_cv_header_sys_time_h = yes; then
-  AC_DEFINE([TIME_WITH_SYS_TIME],[1],[Define to 1 if you can safely include both <sys/time.h>
-	     and <time.h>.  This macro is obsolete.])
-fi
-# End of obsolete code.
 
 AC_HEADER_SYS_WAIT