diff --git a/tryton/gui/window/form.py b/tryton/gui/window/form.py
index 5026e5b245..5ee1f1c6a9 100644
--- a/tryton/gui/window/form.py
+++ b/tryton/gui/window/form.py
@@ -641,6 +641,7 @@ class Form(SignalEvent, TabContent):
 
         msg = name + ' / ' + str(signal_data[1])
         if (signal_data[1] < signal_data[2]
+                and self.screen.limit is not None
                 and signal_data[2] > self.screen.limit):
             msg += _(' of ') + str(signal_data[2])
         self.status_label.set_text(msg)