diff --git a/src/matrix/SessionContainer.js b/src/matrix/SessionContainer.js
index 5c6f6cd8..5468ba70 100644
--- a/src/matrix/SessionContainer.js
+++ b/src/matrix/SessionContainer.js
@@ -86,7 +86,7 @@ export class SessionContainer {
         } catch (err) {
             this._error = err;
             if (err instanceof HomeServerError) {
-                if (err.statusCode === 403) {
+                if (err.errcode === "M_FORBIDDEN") {
                     this._loginFailure = LoginFailure.Credentials;
                 } else {
                     this._loginFailure = LoginFailure.Unknown;