diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index 39d0751..76bda96 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -3190,6 +3190,7 @@ transcendental functions).")
      `(("python-pyparsing" ,python-pyparsing)
        ("python-pygobject" ,python-pygobject)
        ("gobject-introspection" ,gobject-introspection)
+       ("python-tkinter" ,python "tk")
        ;; The 'gtk+' package (and 'gdk-pixbuf', 'atk' and 'pango' propagated
        ;; from 'gtk+') provides the required 'typelib' files used by
        ;; 'gobject-introspection'. The location of these files is set with the
@@ -3244,7 +3245,7 @@ transcendental functions).")
             (call-with-output-file "setup.cfg"
               (lambda (port)
                 (format port "[rc_options]~%
-backend = GTK3Agg~%")))))
+backend = TkAgg~%")))))
         (alist-cons-after
          'install 'install-doc
          (lambda* (#:key outputs #:allow-other-keys)