diff --git a/android/hal-ipc-api.txt b/android/hal-ipc-api.txt
index 0b1fb7d..0a269b2 100644
--- a/android/hal-ipc-api.txt
+++ b/android/hal-ipc-api.txt
@@ -1933,6 +1933,10 @@ Android HAL name: "gatt" (BT_PROFILE_GATT_ID)
 		Valid GATT Write Parameters: As described in Write Characteristic
 
 	Opcode 0x90 - Execute Write notification
+
+		Notification parameters: Connection ID (4 octets)
+		                         Status (4 octets)
+
 	Opcode 0x91 - Read Remote RSSI notification
 	Opcode 0x92 - Listen notification
 
diff --git a/android/hal-msg.h b/android/hal-msg.h
index 9ba190c..6019506 100644
--- a/android/hal-msg.h
+++ b/android/hal-msg.h
@@ -1366,3 +1366,9 @@ struct hal_ev_gatt_client_write_descriptor {
 	int32_t status;
 	struct hal_gatt_write_params data;
 } __attribute__((packed));
+
+#define HAL_EV_GATT_CLIENT_EXEC_WRITE		0x90
+struct hal_ev_gatt_client_exec_write {
+	int32_t conn_id;
+	int32_t status;
+} __attribute__((packed));