diff --git a/app/dialogs.py b/app/dialogs.py
index d25e404..e5cef18 100644
--- a/app/dialogs.py
+++ b/app/dialogs.py
@@ -489,7 +489,7 @@ class SaleLine(QWidget):
 class Help(HelpDialog):
 
     def __init__(self, parent):
-        super(Help, self).__init__(self)
+        super(Help, self).__init__(parent)
         shortcuts = [
             (self.tr('HELP'), 'F1'),
             (self.tr('SEARCH PRODUCT'), 'F2'),