diff --git a/src/mainboard/google/rush_ryu/gpio.h b/src/mainboard/google/rush_ryu/gpio.h
index 2792ec389f..839edc04d0 100644
--- a/src/mainboard/google/rush_ryu/gpio.h
+++ b/src/mainboard/google/rush_ryu/gpio.h
@@ -21,15 +21,27 @@
 #define __MAINBOARD_GOOGLE_RUSH_RYU_GPIO_H__
 
 #include <gpio.h>
+#include <base3.h>
 
 /* Board ID definitions. */
 enum {
-	BOARD_ID_PROTO_0	= 0,
-	BOARD_ID_PROTO_1	= 1,
-	BOARD_ID_EVT		= 2,
-	BOARD_ID_DVT		= 3,
-	BOARD_ID_PVT		= 4,
-	BOARD_ID_MP		= 5,
+	BOARD_REV0 = BASE3(0, 0),
+	BOARD_REV1 = BASE3(0, 1),
+	BOARD_REV2 = BASE3(0, Z),
+	BOARD_REV3 = BASE3(1, 0),
+	BOARD_REV4 = BASE3(1, 1),
+	BOARD_REV5 = BASE3(1, Z),
+	BOARD_REV6 = BASE3(Z, 0),
+	BOARD_REV7 = BASE3(Z, 1),
+	BOARD_REV8 = BASE3(Z, Z),
+
+	BOARD_ID_PROTO_0	= BOARD_REV0,
+	BOARD_ID_PROTO_1	= BOARD_REV1,
+	BOARD_ID_PROTO_3	= BOARD_REV2,
+	BOARD_ID_EVT		= BOARD_REV3,
+	BOARD_ID_DVT		= BOARD_REV4,
+	BOARD_ID_PVT		= BOARD_REV5,
+	BOARD_ID_MP		= BOARD_REV6,
 };
 
 enum {