diff --git a/lib/pleroma/web/federator/federator.ex b/lib/pleroma/web/federator/federator.ex
index e4ab9ba32..130654145 100644
--- a/lib/pleroma/web/federator/federator.ex
+++ b/lib/pleroma/web/federator/federator.ex
@@ -94,7 +94,7 @@ def perform(:incoming_ap_doc, params) do
 
       e ->
         # Just drop those for now
-        Logger.debug("Unhandled activity\n" <> Jason.encode!(params, pretty: true))
+        Logger.debug(fn -> "Unhandled activity\n" <> Jason.encode!(params, pretty: true) end)
         {:error, e}
     end
   end