diff --git a/exchanges/ftx/ftx_types.go b/exchanges/ftx/ftx_types.go
index 718714d7..ecd061ec 100644
--- a/exchanges/ftx/ftx_types.go
+++ b/exchanges/ftx/ftx_types.go
@@ -553,9 +553,10 @@ type OptionFillsData struct {
 
 // AuthenticationData stores authentication variables required
 type AuthenticationData struct {
-	Key  string `json:"key"`
-	Sign string `json:"sign"`
-	Time int64  `json:"time"`
+	Key        string `json:"key"`
+	Sign       string `json:"sign"`
+	Time       int64  `json:"time"`
+	SubAccount string `json:"subaccount,omitempty"`
 }
 
 // Authenticate stores authentication variables required
diff --git a/exchanges/ftx/ftx_websocket.go b/exchanges/ftx/ftx_websocket.go
index f84d6c8c..601ce1a0 100644
--- a/exchanges/ftx/ftx_websocket.go
+++ b/exchanges/ftx/ftx_websocket.go
@@ -90,11 +90,13 @@ func (f *FTX) WsAuth() error {
 	sign := crypto.HexEncodeToString(hmac)
 	req := Authenticate{Operation: "login",
 		Args: AuthenticationData{
-			Key:  f.API.Credentials.Key,
-			Sign: sign,
-			Time: intNonce,
+			Key:        f.API.Credentials.Key,
+			Sign:       sign,
+			Time:       intNonce,
+			SubAccount: f.API.Credentials.Subaccount,
 		},
 	}
+
 	return f.Websocket.Conn.SendJSONMessage(req)
 }