diff --git a/lib/elixir_sense/providers/suggestion/reducers/common.ex b/lib/elixir_sense/providers/suggestion/reducers/common.ex
index a1124d8d..6fe8d5af 100644
--- a/lib/elixir_sense/providers/suggestion/reducers/common.ex
+++ b/lib/elixir_sense/providers/suggestion/reducers/common.ex
@@ -10,7 +10,7 @@ defmodule ElixirSense.Providers.Suggestion.Reducers.Common do
   @type attribute :: %{
           type: :attribute,
           name: String.t(),
-          summary: String.t()
+          summary: String.t() | nil
         }
 
   @type variable :: %{