diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 20a81a0..692432c 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -96,6 +96,7 @@
 CONFIG_SYSCON=y
 CONFIG_DEVRES=y
 CONFIG_DEBUG_DEVRES=y
+CONFIG_SIMPLE_PM_BUS=y
 CONFIG_ADC=y
 CONFIG_ADC_SANDBOX=y
 CONFIG_AXI=y