diff --git a/autogen.sh b/autogen.sh
index d68a142..ec17443 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,3 +1,3 @@
 #! /bin/sh
-autoreconf -v --install || exit 1
+autoreconf -v --force --install || exit 1
 ./configure "$@"
diff --git a/configure.ac b/configure.ac
index 2c7a63d..961b299 100644
--- a/configure.ac
+++ b/configure.ac
@@ -22,9 +22,10 @@ AC_CHECK_HEADERS([termios.h sys/time.h unistd.h errno.h limits.h fcntl.h sys/typ
 AC_C_CONST
 AC_TYPE_SIZE_T
 AC_HEADER_TIME
-AC_TYPE_UINT16_T
-AC_TYPE_UINT32_T
-AC_TYPE_UINT8_T
+# AC_TYPE_UINT*_T: not supported by autoconf-2.59 of CentOS 5.3
+# AC_TYPE_UINT16_T
+# AC_TYPE_UINT32_T
+# AC_TYPE_UINT8_T
 
 # Cygwin defines IPTOS_LOWDELAY but can't handle that flag so it's necessary to
 # workaround that problem and Cygwin doesn't define MSG_DONTWAIT.