diff --git a/lib/service/formatter/html.ex b/lib/service/formatter/html.ex
index 67948d030..7ee4a3a81 100644
--- a/lib/service/formatter/html.ex
+++ b/lib/service/formatter/html.ex
@@ -42,6 +42,7 @@ defmodule Mobilizon.Service.Formatter.HTML do
   def strip_tags_and_insert_spaces(html), do: html
 
   @spec html_to_text(String.t()) :: String.t()
+  def html_to_text(nil), do: nil
   def html_to_text(html) do
     html
     |> String.replace(~r/<li>/, "\\g{1}- ", global: true)