diff --git a/android/hal-ipc-api.txt b/android/hal-ipc-api.txt
index 51aaba1..bbb94a9 100644
--- a/android/hal-ipc-api.txt
+++ b/android/hal-ipc-api.txt
@@ -1443,6 +1443,14 @@ Android HAL name: "gatt" (BT_PROFILE_GATT_ID)
 		In case of an error, the error response will be returned.
 
 	Opcode 0x04 - Connect Device command/response
+
+		Command parameters: Client Interface (4 octets)
+		                    Remote address (6 octets)
+		                    Is Direct (1 octet)
+		Response parameters: <none>
+
+		In case of an error, the error response will be returned.
+
 	Opcode 0x05 - Disconnect Device command/response
 	Opcode 0x06 - Listen command/response
 	Opcode 0x07 - Refresh command/response
diff --git a/android/hal-msg.h b/android/hal-msg.h
index d0f8fb1..0633003 100644
--- a/android/hal-msg.h
+++ b/android/hal-msg.h
@@ -534,6 +534,13 @@ struct hal_cmd_gatt_client_scan {
 	uint8_t start;
 } __attribute__((packed));
 
+#define HAL_OP_GATT_CLIENT_CONNECT		0x04
+struct hal_cmd_gatt_client_connect {
+	int32_t client_if;
+	uint8_t bdaddr[6];
+	uint8_t is_direct;
+} __attribute__((packed));
+
 /* Notifications and confirmations */
 
 #define HAL_POWER_OFF			0x00