diff --git a/src/mainboard/google/brox/variants/baseboard/brox/include/baseboard/ec.h b/src/mainboard/google/brox/variants/baseboard/brox/include/baseboard/ec.h
index 722f48bb32..a027b4c9f6 100644
--- a/src/mainboard/google/brox/variants/baseboard/brox/include/baseboard/ec.h
+++ b/src/mainboard/google/brox/variants/baseboard/brox/include/baseboard/ec.h
@@ -75,5 +75,6 @@
 #define SIO_EC_ENABLE_PS2K       /* Enable PS/2 Keyboard */
 
 #define EC_ENABLE_SYNC_IRQ      /* Enable tight timestamp / wake support */
+#define EC_SYNC_IRQ_WAKE_CAPABLE /* Let the OS know ec_sync is wake capable */
 
 #endif /* __BASEBOARD_EC_H__ */
diff --git a/src/mainboard/google/brya/variants/baseboard/brask/include/baseboard/ec.h b/src/mainboard/google/brya/variants/baseboard/brask/include/baseboard/ec.h
index caca0f3190..48cec0c091 100644
--- a/src/mainboard/google/brya/variants/baseboard/brask/include/baseboard/ec.h
+++ b/src/mainboard/google/brya/variants/baseboard/brask/include/baseboard/ec.h
@@ -41,5 +41,6 @@
 #define SIO_EC_HOST_ENABLE       /* EC Host Interface Resources */
 
 #define EC_ENABLE_SYNC_IRQ      /* Enable tight timestamp / wake support */
+#define EC_SYNC_IRQ_WAKE_CAPABLE /* Let the OS know ec_sync is wake capable */
 
 #endif /* __BASEBOARD_EC_H__ */
diff --git a/src/mainboard/google/brya/variants/baseboard/brya/include/baseboard/ec.h b/src/mainboard/google/brya/variants/baseboard/brya/include/baseboard/ec.h
index 8ca2dbd386..8d296ac574 100644
--- a/src/mainboard/google/brya/variants/baseboard/brya/include/baseboard/ec.h
+++ b/src/mainboard/google/brya/variants/baseboard/brya/include/baseboard/ec.h
@@ -80,5 +80,6 @@
 #define SIO_EC_ENABLE_PS2K       /* Enable PS/2 Keyboard */
 
 #define EC_ENABLE_SYNC_IRQ      /* Enable tight timestamp / wake support */
+#define EC_SYNC_IRQ_WAKE_CAPABLE /* Let the OS know ec_sync is wake capable */
 
 #endif /* __BASEBOARD_EC_H__ */
diff --git a/src/mainboard/google/brya/variants/baseboard/hades/include/baseboard/ec.h b/src/mainboard/google/brya/variants/baseboard/hades/include/baseboard/ec.h
index 122cc0cbe8..545eb97329 100644
--- a/src/mainboard/google/brya/variants/baseboard/hades/include/baseboard/ec.h
+++ b/src/mainboard/google/brya/variants/baseboard/hades/include/baseboard/ec.h
@@ -70,5 +70,6 @@
 #define SIO_EC_ENABLE_PS2K       /* Enable PS/2 Keyboard */
 
 #define EC_ENABLE_SYNC_IRQ      /* Enable tight timestamp / wake support */
+#define EC_SYNC_IRQ_WAKE_CAPABLE /* Let the OS know ec_sync is wake capable */
 
 #endif /* __BASEBOARD_EC_H__ */
diff --git a/src/mainboard/google/rex/variants/baseboard/ovis/include/baseboard/ec.h b/src/mainboard/google/rex/variants/baseboard/ovis/include/baseboard/ec.h
index a0f47d9360..37c8a74318 100644
--- a/src/mainboard/google/rex/variants/baseboard/ovis/include/baseboard/ec.h
+++ b/src/mainboard/google/rex/variants/baseboard/ovis/include/baseboard/ec.h
@@ -60,5 +60,6 @@
 #define SIO_EC_ENABLE_PS2K       /* Enable PS/2 Keyboard */
 
 #define EC_ENABLE_SYNC_IRQ      /* Enable tight timestamp / wake support */
+#define EC_SYNC_IRQ_WAKE_CAPABLE /* Let the OS know ec_sync is wake capable */
 
 #endif /* __BASEBOARD_EC_H__ */
diff --git a/src/mainboard/google/rex/variants/baseboard/rex/include/baseboard/ec.h b/src/mainboard/google/rex/variants/baseboard/rex/include/baseboard/ec.h
index 4dc2bcefa6..f4a9aab3ca 100644
--- a/src/mainboard/google/rex/variants/baseboard/rex/include/baseboard/ec.h
+++ b/src/mainboard/google/rex/variants/baseboard/rex/include/baseboard/ec.h
@@ -74,5 +74,6 @@
 #define SIO_EC_ENABLE_PS2K       /* Enable PS/2 Keyboard */
 
 #define EC_ENABLE_SYNC_IRQ      /* Enable tight timestamp / wake support */
+#define EC_SYNC_IRQ_WAKE_CAPABLE /* Let the OS know ec_sync is wake capable */
 
 #endif /* __BASEBOARD_EC_H__ */