diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
index dc7b3c7..57e011d 100644
--- a/drivers/bus/Kconfig
+++ b/drivers/bus/Kconfig
@@ -120,7 +120,7 @@
 	  SRAM, ethernet adapters, FPGAs and LCD displays.
 
 config SIMPLE_PM_BUS
-	bool "Simple Power-Managed Bus Driver"
+	tristate "Simple Power-Managed Bus Driver"
 	depends on OF && PM
 	help
 	  Driver for transparent busses that don't need a real driver, but