diff --git a/electrum/gui/qt/wallet_info_dialog.py b/electrum/gui/qt/wallet_info_dialog.py
index 61cf4b7cc..2caad1914 100644
--- a/electrum/gui/qt/wallet_info_dialog.py
+++ b/electrum/gui/qt/wallet_info_dialog.py
@@ -161,7 +161,7 @@ class WalletInfoDialog(WindowModalDialog):
             vbox.addWidget(ks_stack)
 
         vbox.addStretch(1)
-        btn_export_info = run_hook('wallet_info_buttons', self, self)
+        btn_export_info = run_hook('wallet_info_buttons', window, self)
         btn_close = CloseButton(self)
         btns = Buttons(btn_export_info, btn_close)
         vbox.addLayout(btns)
diff --git a/electrum/plugins/coldcard/qt.py b/electrum/plugins/coldcard/qt.py
index c7d4ed48b..acfdf3d6b 100644
--- a/electrum/plugins/coldcard/qt.py
+++ b/electrum/plugins/coldcard/qt.py
@@ -45,9 +45,10 @@ class Plugin(ColdcardPlugin, QtPluginBase):
 
     @only_hook_if_libraries_available
     @hook
-    def wallet_info_buttons(self, main_window, dialog):
+    def wallet_info_buttons(self, main_window: 'ElectrumWindow', dialog):
         # user is about to see the "Wallet Information" dialog
         # - add a button if multisig wallet, and a Coldcard is a cosigner.
+        assert isinstance(main_window, ElectrumWindow), f"{type(main_window)}"
         wallet = main_window.wallet
 
         if type(wallet) is not Multisig_Wallet: