diff --git a/ws/ws_op.go b/ws/ws_op.go
index 3afa79f..c9e78f8 100644
--- a/ws/ws_op.go
+++ b/ws/ws_op.go
@@ -87,7 +87,7 @@ func (a *WsClient) Login(apiKey, secKey, passPhrase string, timeOut ...int) (res
 
 	timestamp := EpochTime()
 
-	preHash := PreHashString(timestamp, rest.GET, "/users/self/verify", "")
+	preHash := PreHashString(timestamp, GET, "/users/self/verify", "")
 	//fmt.Println("preHash:", preHash)
 	var sign string
 	if sign, err = HmacSha256Base64Signer(preHash, secKey); err != nil {