diff --git a/lib/archethic_web/controllers/explorer_controller.ex b/lib/archethic_web/controllers/explorer_controller.ex
index 4e8014d6f..1dba04c1b 100644
--- a/lib/archethic_web/controllers/explorer_controller.ex
+++ b/lib/archethic_web/controllers/explorer_controller.ex
@@ -110,7 +110,8 @@ defmodule ArchEthicWeb.ExplorerController do
       transaction_chain: [],
       address: "",
       chain_size: 0,
-      last_checked?: false
+      last_checked?: false,
+      uco_balance: 0
     )
   end
 end