diff --git a/configure.ac b/configure.ac
index a6a214b..050d30d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -40,6 +40,12 @@ AC_ARG_ENABLE(threads, AC_HELP_STRING([--enable-threads],
 AC_CHECK_FUNC(signalfd, dummy=yes,
 			AC_MSG_ERROR(signalfd support is required))
 
+AC_CHECK_FUNC(clock_gettime, dummy=yes,
+			AC_MSG_ERROR(realtime clock support is required))
+
+AC_CHECK_LIB(pthread, pthread_create, dummy=yes,
+			AC_MSG_ERROR(posix thread support is required))
+
 AC_CHECK_LIB(dl, dlopen, dummy=yes,
 			AC_MSG_ERROR(dynamic linking loader is required))