diff -up system-config-printer-1.5.11/authconn.py.authdialog system-config-printer-1.5.11/authconn.py
--- system-config-printer-1.5.11/authconn.py.authdialog	2018-02-15 11:42:35.074157581 +0100
+++ system-config-printer-1.5.11/authconn.py	2018-02-15 11:43:51.652437359 +0100
@@ -78,11 +78,9 @@ class AuthDialog(Gtk.Dialog):
             field = auth_info_required[i]
             label = Gtk.Label (label=_(self.AUTH_FIELD.get (field, field)))
             label.set_alignment (0, 0.5)
-            grid.attach (label, 0, 1, i, i + 1)
             grid.attach (label, 0, i, 1, 1)
             entry = Gtk.Entry ()
             entry.set_visibility (field != 'password')
-            grid.attach (entry, 1, 2, i, i + 1, 0, 0)
             grid.attach (entry, 1, i, 1, 1)
             self.field_entry.append (entry)