diff --git a/gramps/grampsapp.py b/gramps/grampsapp.py
index f5f6fbbb4..065be64a5 100644
--- a/gramps/grampsapp.py
+++ b/gramps/grampsapp.py
@@ -315,7 +315,7 @@ def show_settings():
     print (' pycairo   : %s' % pycairover_str)
     print (' osmgpsmap : %s' % osmgpsmap_str)
     print (' pyexiv2   : %s' % pyexiv2_str)
-    print (' o.s.      : %s' % operating_system)
+    print (' o.s.      : %s' % sys.platform)
     if kernel:
         print (' kernel    : %s' % kernel)
     print ('')