diff --git a/grum/menus/menubase.py b/grum/menus/menubase.py
index e6b6f7c..7f90cb3 100644
--- a/grum/menus/menubase.py
+++ b/grum/menus/menubase.py
@@ -2,12 +2,16 @@ from PyQt5.QtWidgets import QAction
 
 
 class MenuBase:
+    """
+    sub-classes need to create self.qmenu
+    QActions need parent=self.qmenu to be set
+    """
 
     def __init__(self):
         self.checkboxes = {}
 
     def addAction(self, name, func):
-        action = QAction(name, triggered=func, parent=self.qmenu) # here, parent needs to be set
+        action = QAction(name, triggered=func, parent=self.qmenu)
         self.qmenu.addAction(action)
 
     def addSeparator(self):