diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 1236ea122061..c14192514e9d 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1084,6 +1084,7 @@ config CSRC_IOASIC
 
 config CSRC_R4K
 	select CLOCKSOURCE_WATCHDOG if CPU_FREQ
+	select HAVE_UNSTABLE_SCHED_CLOCK if SMP && 64BIT
 	bool
 
 config CSRC_SB1250