diff --git a/terminatorlib/terminal_popup_menu.py b/terminatorlib/terminal_popup_menu.py
index 322f6be2..e9cd1b5d 100755
--- a/terminatorlib/terminal_popup_menu.py
+++ b/terminatorlib/terminal_popup_menu.py
@@ -151,12 +151,16 @@ class TerminalPopupMenu(object):
         menu.append(Gtk.MenuItem())
 
         if not terminal.is_zoomed():
+            sensitive = not terminal.get_toplevel() == terminal.get_parent()
+
             item = Gtk.MenuItem.new_with_mnemonic(_('_Zoom terminal'))
             item.connect('activate', terminal.zoom)
+            item.set_sensitive(sensitive)
             menu.append(item)
 
             item = Gtk.MenuItem.new_with_mnemonic(_('Ma_ximise terminal'))
             item.connect('activate', terminal.maximise)
+            item.set_sensitive(sensitive)
             menu.append(item)
 
             menu.append(Gtk.MenuItem())