diff --git a/tryton/gui/window/view_form/view/list_gtk/widget.py b/tryton/gui/window/view_form/view/list_gtk/widget.py
index 44d4a5bbfd..fc62e2bcb8 100644
--- a/tryton/gui/window/view_form/view/list_gtk/widget.py
+++ b/tryton/gui/window/view_form/view/list_gtk/widget.py
@@ -377,7 +377,7 @@ class Time(Date):
         if not record:
             return ''
         value = record[self.attrs['name']].get_client(record)
-        if value:
+        if value is not None:
             return value.strftime(self.renderer.props.format)
         else:
             return ''