diff --git a/src/mainboard/google/rambi/acpi/mainboard.asl b/src/mainboard/google/rambi/acpi/mainboard.asl
index f0f7a4c178..e6a7448030 100644
--- a/src/mainboard/google/rambi/acpi/mainboard.asl
+++ b/src/mainboard/google/rambi/acpi/mainboard.asl
@@ -26,6 +26,7 @@ Scope (\_SB)
 	Device (LID0)
 	{
 		Name (_HID, EisaId ("PNP0C0D"))
+		Name (_PRW, Package() { BOARD_PCH_WAKE_GPIO, 0x5 })
 		Method (_LID, 0)
 		{
 			Store (\_SB.PCI0.LPCB.EC0.LIDS, \LIDS)
diff --git a/src/mainboard/google/rambi/onboard.h b/src/mainboard/google/rambi/onboard.h
index 18ceca384d..8ea2e8a475 100644
--- a/src/mainboard/google/rambi/onboard.h
+++ b/src/mainboard/google/rambi/onboard.h
@@ -22,6 +22,9 @@
 
 #include "irqroute.h"
 
+/* PCH wake signal from EC. */
+#define BOARD_PCH_WAKE_GPIO             ACPI_ENABLE_WAKE_SUS_GPIO(0)
+
 #define BOARD_TRACKPAD_NAME             "trackpad"
 #define BOARD_TRACKPAD_IRQ              GPIO_S0_DED_IRQ(TPAD_IRQ_OFFSET)
 #define BOARD_TRACKPAD_WAKE_GPIO        ACPI_ENABLE_WAKE_SUS_GPIO(1)