diff --git a/src/gui_interface.py b/src/gui_interface.py
index e85571cf1..0648c302f 100644
--- a/src/gui_interface.py
+++ b/src/gui_interface.py
@@ -3403,7 +3403,7 @@ class PassphraseRequest:
                 gajim.interface.forget_gpg_passphrase, self.keyid)
         for (account, cb) in self.callbacks:
             self.run_callback(account, cb)
-        del self.callbacks
+        self.callbacks = []
 
     def create_dialog(self, account):
         title = _('Passphrase Required')