diff --git a/lib/pleroma/formatter.ex b/lib/pleroma/formatter.ex
index 5b63fb795..21b08a62e 100644
--- a/lib/pleroma/formatter.ex
+++ b/lib/pleroma/formatter.ex
@@ -248,7 +248,12 @@ def add_user_links({subs, text}, mentions) do
     subs =
       subs ++
         Enum.map(mentions, fn {match, %User{ap_id: ap_id, info: info}, uuid} ->
-          ap_id = info["source_data"]["url"] || ap_id
+          ap_id =
+            if is_binary(info["source_data"]["url"]) do
+              info["source_data"]["url"]
+            else
+              ap_id
+            end
 
           short_match = String.split(match, "@") |> tl() |> hd()