diff --git a/gajim/groupchat_control.py b/gajim/groupchat_control.py
index c07cbba5fd4ff8642685167524f557fe86a29dd6..8327ab9a8fb45ef6c8fd75c2596f3202c7330e11 100644
--- a/gajim/groupchat_control.py
+++ b/gajim/groupchat_control.py
@@ -828,8 +828,8 @@ def on_approve():
         NewConfirmationDialog(
             _('Voice Request'),
             _('Voice Request'),
-            _('<b>%(nick)s</b> from <b>%(room_name)s</b> requests voice') % (
-                event.voice_request.nick, self.room_name),
+            _('<b>%(nick)s</b> from <b>%(room_name)s</b> requests voice') % {
+                'nick': event.voice_request.nick, 'room_name': self.room_name},
             [DialogButton.make('Cancel'),
              DialogButton.make('Accept',
                                text=_('_Approve'),
diff --git a/gajim/gui_interface.py b/gajim/gui_interface.py
index 1436e162a17aa020ac47902968d0989b5aa7a7f1..a189ac32b8502421ff35f3762807ab12eff0c7cb 100644
--- a/gajim/gui_interface.py
+++ b/gajim/gui_interface.py
@@ -352,7 +352,8 @@ def _remove():
         jid = contact.jid
         NewConfirmationDialog(
             _('Subscription Removed'),
-            _('%(name)s (%(jid)s) has removed subscription from you') % (name, jid),
+            _('%(name)s (%(jid)s) has removed subscription from you') % {
+                'name': name, 'jid': jid},
             _('You will always see this contact as offline.\n'
               'Do you want to remove them from your contact list?'),
             [DialogButton.make('Cancel',