diff --git a/src/assets/js/backend_calendar.js b/src/assets/js/backend_calendar.js
index d6d11db4..a042c97d 100644
--- a/src/assets/js/backend_calendar.js
+++ b/src/assets/js/backend_calendar.js
@@ -291,7 +291,7 @@ var BackendCalendar = {
                     $('#enable-sync span:eq(1)').text(EALang['disable_sync']);
                     $('#google-sync').prop('disabled', false);
                 } else {
-                    $('#enable-sync').removeClass('btn-success enabled');
+                    $('#enable-sync').removeClass('btn-danger enabled');
                     $('#enable-sync span:eq(1)').text(EALang['enable_sync']);
                     $('#google-sync').prop('disabled', true);
                 }
@@ -776,7 +776,7 @@ var BackendCalendar = {
 
                         BackendCalendar.disableProviderSync(provider['id']);
 
-                        $('#enable-sync').removeClass('btn-success enabled');
+                        $('#enable-sync').removeClass('btn-danger enabled');
                         $('#enable-sync span:eq(1)').text(EALang['enable_sync']);
                         $('#google-sync').prop('disabled', true);
                         $('#select-filter-item option:selected').attr('google-sync', 'false');