diff --git a/interfaces/cython/cantera/mixmaster/ControlPanel.py b/interfaces/cython/cantera/mixmaster/ControlPanel.py
index 9eca455ac..1f167e3c6 100644
--- a/interfaces/cython/cantera/mixmaster/ControlPanel.py
+++ b/interfaces/cython/cantera/mixmaster/ControlPanel.py
@@ -106,40 +106,35 @@ def make_menu(name, menubar, lst):
     button=Menubutton(menubar, text=name, width=nc+4, padx=3,pady=1)
     button.pack(side=LEFT)
     menu = Menu(button,tearoff=FALSE)
-    m = menu
-    i = 0
     for entry in lst:
-        i += 1
-        if entry == 'separator':
-            menu.add_separator({})
-        elif isinstance(entry, list):
-            for num in entry:
-                menu.entryconfig(num,state=DISABLED)
-        elif not isinstance(entry[1], list):
-            if i == 20:
-                i = 0
-                submenu = Menu(button,tearoff=FALSE)
-                m.add_cascade(label='More...',
-                                 menu=submenu)
-                m = submenu
-            if len(entry) == 2 or entry[2] == 'command':
-                m.add_command(label=entry[0],
-                              command=entry[1])
-            elif entry[2] == 'check':
-                entry[3].set(0)
-                if len(entry) >= 5: val = entry[4]
-                else: val = 1
-                m.add_checkbutton(label=entry[0],
-                                     command=entry[1],
-                                     variable = entry[3],
-                                     onvalue=val)
-        else:
-            submenu=make_menu(entry[0], menu, entry[1])
-            m.add_cascade(label=entry[0],
-                             menu=submenu)
+        add_menu_item(menu, entry)
     button['menu']=menu
     return button
 
+def add_menu_item(menu, entry):
+    if entry == 'separator':
+        menu.add_separator({})
+    elif isinstance(entry, list):
+        for num in entry:
+            menu.entryconfig(num,state=DISABLED)
+    elif not isinstance(entry[1], list):
+        if len(entry) == 2 or entry[2] == 'command':
+            menu.add_command(label=entry[0],
+                             command=entry[1])
+        elif entry[2] == 'check':
+            entry[3].set(0)
+            if len(entry) >= 5: val = entry[4]
+            else: val = 1
+            menu.add_checkbutton(label=entry[0],
+                                 command=entry[1],
+                                 variable = entry[3],
+                                 onvalue=val)
+    else:
+        submenu=make_menu(entry[0], menu, entry[1])
+        menu.add_cascade(label=entry[0],
+                         menu=submenu)
+
+
 def menuitem_state(button, *statelist):
     for menu in button.children.keys():
         if isinstance(button.children[menu], Menu):
diff --git a/interfaces/cython/cantera/mixmaster/MechManager.py b/interfaces/cython/cantera/mixmaster/MechManager.py
index a1d2e6e91..75f0f166f 100644
--- a/interfaces/cython/cantera/mixmaster/MechManager.py
+++ b/interfaces/cython/cantera/mixmaster/MechManager.py
@@ -7,7 +7,7 @@ else:
     from Tkinter import *
 
 from .ControlPanel import ControlWindow
-from .ControlPanel import make_menu, menuitem_state
+from .ControlPanel import make_menu, menuitem_state, add_menu_item
 #from Cantera.Examples.Tk import _mechdir
 import os
 
@@ -52,9 +52,9 @@ class MechManager(Frame):
         self.mechanisms.append((name, mech))
         il = len(self.mechanisms)
         self.mlist[-1] = (name, self.setMechanism, 'check', self.mechindx, il)
+        add_menu_item(list(self.mechmenu.children.values())[0], self.mlist[-1])
         self.mlist.append([])
 
-        self.mechmenu = make_menu('Mixtures', self, self.mlist)
         self.mechindx.set(il)
         self.mechmenu.grid(row=0,column=0,sticky=W)