diff --git a/src/mainboard/google/kahlee/variants/treeya/include/variant/ec.h b/src/mainboard/google/kahlee/variants/treeya/include/variant/ec.h
index 73e07aef30..4a1c7fca7b 100644
--- a/src/mainboard/google/kahlee/variants/treeya/include/variant/ec.h
+++ b/src/mainboard/google/kahlee/variants/treeya/include/variant/ec.h
@@ -20,3 +20,9 @@
 
 /* Enable Tablet switch */
 #define EC_ENABLE_TBMC_DEVICE
+
+/*
+ * Enable EC sync interrupt via GPIO controller, EC_SYNC_IRQ is defined in
+ * variant/gpio.h
+ */
+#define EC_ENABLE_SYNC_IRQ_GPIO
diff --git a/src/mainboard/google/kahlee/variants/treeya/include/variant/gpio.h b/src/mainboard/google/kahlee/variants/treeya/include/variant/gpio.h
index 5a6b54044f..3ddabb1f27 100644
--- a/src/mainboard/google/kahlee/variants/treeya/include/variant/gpio.h
+++ b/src/mainboard/google/kahlee/variants/treeya/include/variant/gpio.h
@@ -14,3 +14,6 @@
  */
 
 #include <baseboard/gpio.h>
+
+/* EC sync irq is AGPIO 10 */
+#define EC_SYNC_IRQ	10