diff --git a/lib/ProMotion/cocoatouch/SplitViewController.rb b/lib/ProMotion/cocoatouch/SplitViewController.rb
index 5983ddf..664984a 100644
--- a/lib/ProMotion/cocoatouch/SplitViewController.rb
+++ b/lib/ProMotion/cocoatouch/SplitViewController.rb
@@ -11,6 +11,10 @@ class SplitViewController < UISplitViewController
     self.viewControllers = [s.main_controller, self.viewControllers.last]
   end
   def detail_screen=(s)
+    # set the button from the old detail screen to the new one
+    button = detail_screen.navigationItem.leftBarButtonItem
+    s.navigationItem.leftBarButtonItem = button
+    
     self.viewControllers = [self.viewControllers.first, s.main_controller]
   end
   def screens=(s_array)