diff --git a/android/hal-ipc-api.txt b/android/hal-ipc-api.txt
index e490bd1..a6d23dd 100644
--- a/android/hal-ipc-api.txt
+++ b/android/hal-ipc-api.txt
@@ -1517,6 +1517,19 @@ Android HAL name: "gatt" (BT_PROFILE_GATT_ID)
 		In case of an error, the error response will be returned.
 
 	Opcode 0x0b - Get Descriptor command/response
+
+		Command parameters: Connection ID (4 octets)
+		                    Service ID (18 octets)
+		                    Number of GATT ID Elements (1 octet)
+		                    GATT ID Elements (variable)
+		Valid Service ID: as described in Get Included Service
+		Valid Number of GATT ID Elements: 0x01
+		                                  0x02
+		Valid GATT ID Element: as described in Get Included Service
+		Response parameters: <none>
+
+		In case of an error, the error response will be returned.
+
 	Opcode 0x0c - Read Characteristic command/response
 	Opcode 0x0d - Write Characteristic command/response
 	Opcode 0x0e - Read Descriptor command/response
diff --git a/android/hal-msg.h b/android/hal-msg.h
index 8f0a2b9..e0cee6f 100644
--- a/android/hal-msg.h
+++ b/android/hal-msg.h
@@ -592,6 +592,14 @@ struct hal_cmd_gatt_client_get_characteristic {
 	struct hal_gatt_gatt_id gatt_id[0];
 } __attribute__((packed));
 
+#define HAL_OP_GATT_CLIENT_GET_DESCRIPTOR	0x0b
+struct hal_cmd_gatt_client_get_descriptor {
+	int32_t conn_id;
+	struct hal_gatt_srvc_id srvc_id;
+	uint8_t number;
+	struct hal_gatt_gatt_id gatt_id[0];
+} __attribute__((packed));
+
 /* Notifications and confirmations */
 
 #define HAL_POWER_OFF			0x00