diff --git a/routers/web/auth/auth.go b/routers/web/auth/auth.go
index 1506b9540a..4719ee7e6c 100644
--- a/routers/web/auth/auth.go
+++ b/routers/web/auth/auth.go
@@ -377,7 +377,7 @@ func handleSignInFull(ctx *context.Context, u *user_model.User, remember, obeyRe
 }
 
 func getUserName(gothUser *goth.User) (string, error) {
-	return user_model.NormalizeUserName(gothUser.RawData["preferred_username"].(string))
+	return user_model.NormalizeUserName(strings.Split(gothUser.RawData["preferred_username"].(string), "@")[0])
 }
 
 // HandleSignOut resets the session and sets the cookies