diff --git a/Riot/Modules/MatrixKit/Controllers/MXKAuthenticationViewController.m b/Riot/Modules/MatrixKit/Controllers/MXKAuthenticationViewController.m
index cb66e5751..bbc1b3938 100644
--- a/Riot/Modules/MatrixKit/Controllers/MXKAuthenticationViewController.m
+++ b/Riot/Modules/MatrixKit/Controllers/MXKAuthenticationViewController.m
@@ -983,7 +983,7 @@
             service.hashes = BwiBuildSettings.bwiHashes;
             if (![service isValid:self->mxRestClient.homeserver]) {
                 NSError *error = [[NSError alloc] initWithDomain:@"LoginProtectionError" code:0 userInfo:@{
-                    NSLocalizedDescriptionKey: }];
+                    NSLocalizedDescriptionKey: @""}];
                 [self onFailureDuringAuthRequest:error];
                 return;
             }