diff --git a/glances/outputs/glances_curses.py b/glances/outputs/glances_curses.py
index 68dabd7c0f21d8907568b555532cb96a0f8d37fb..32801ab9537492f20d76522509effa8e061193ee 100644
--- a/glances/outputs/glances_curses.py
+++ b/glances/outputs/glances_curses.py
@@ -1245,15 +1245,14 @@ class GlancesCursesBrowser(_GlancesCurses):
         return True
 
 if not is_windows:
+    class GlancesTextbox(Textbox, object):
 
-    class GlancesTextbox(Textbox):
-
-        def __init__(*args, **kwargs):
-            Textbox.__init__(*args, **kwargs)
+        def __init__(self, *args, **kwargs):
+            super(GlancesTextbox, self).__init__(*args, **kwargs)
 
         def do_command(self, ch):
             if ch == 10:  # Enter
                 return 0
             if ch == 127:  # Back
                 return 8
-            return Textbox.do_command(self, ch)
+            return super(GlancesTextbox, self).do_command(ch)