diff --git a/src/flux/stores/observable-list-data-source.coffee b/src/flux/stores/observable-list-data-source.coffee
index 437f8b305..eb175c07e 100644
--- a/src/flux/stores/observable-list-data-source.coffee
+++ b/src/flux/stores/observable-list-data-source.coffee
@@ -58,6 +58,7 @@ class ObservableListDataSource extends ListTabular.DataSource
     @_resultSet.modelAtOffset(offset)
 
   getById: (id) ->
+    return null unless @_resultSet
     @_resultSet.modelWithId(id)
 
   indexOfId: (id) ->