diff --git a/acinclude.m4 b/acinclude.m4
index 429e466..d83e2e9 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -92,15 +92,8 @@ AC_DEFUN([AC_INIT_BLUEZ], [
 ])
 
 AC_DEFUN([AC_PATH_DBUS], [
-	PKG_CHECK_MODULES(DBUS, dbus-1 >= 1.0, dummy=yes,
-				AC_MSG_ERROR(D-Bus library is required))
-	AC_CHECK_LIB(dbus-1, dbus_watch_get_unix_fd, dummy=yes,
-		AC_DEFINE(NEED_DBUS_WATCH_GET_UNIX_FD, 1,
-			[Define to 1 if you need the dbus_watch_get_unix_fd() function.]))
-	AC_CHECK_LIB(dbus-1, dbus_connection_can_send_type, dummy=yes,
-		AC_DEFINE(NEED_DBUS_CONNECTION_CAN_SEND_TYPE, 1,
-			[Define to 1 if you need the dbus_connection_can_send_type() function.]
-))
+	PKG_CHECK_MODULES(DBUS, dbus-1 >= 1.4, dummy=yes,
+				AC_MSG_ERROR(D-Bus >= 1.4 is required))
 	AC_SUBST(DBUS_CFLAGS)
 	AC_SUBST(DBUS_LIBS)
 ])