diff --git a/modules/juce_gui_basics/menus/juce_PopupMenu.h b/modules/juce_gui_basics/menus/juce_PopupMenu.h
index f9711fa54d..daf193794d 100644
--- a/modules/juce_gui_basics/menus/juce_PopupMenu.h
+++ b/modules/juce_gui_basics/menus/juce_PopupMenu.h
@@ -153,13 +153,11 @@ public:
 
     /** Appends a custom menu item that can't be used to trigger a result.
 
-        This will add a user-defined component to use as a menu item. Unlike the
-        addCustomItem() method that takes a PopupMenu::CustomComponent, this version
-        can't trigger a result from it, so doesn't take a menu ID. It also doesn't
-        delete the component when it's finished, so it's the caller's responsibility
-        to manage the component that is passed-in.
+        This will add a user-defined component to use as a menu item.
+        It's the caller's responsibility to delete the component that is passed-in
+        when it's no longer needed after the menu has been hidden.
 
-        if triggerMenuItemAutomaticallyWhenClicked is true, the menu itself will handle
+        If triggerMenuItemAutomaticallyWhenClicked is true, the menu itself will handle
         detection of a mouse-click on your component, and use that to trigger the
         menu ID specified in itemResultID. If this is false, the menu item can't
         be triggered, so itemResultID is not used.
diff --git a/modules/juce_gui_basics/widgets/juce_Slider.cpp b/modules/juce_gui_basics/widgets/juce_Slider.cpp
index c2703b3b5c..983b6c70b3 100644
--- a/modules/juce_gui_basics/widgets/juce_Slider.cpp
+++ b/modules/juce_gui_basics/widgets/juce_Slider.cpp
@@ -365,6 +365,8 @@ public:
         ~DragInProgress()                           { owner.sendDragEnd(); }
 
         Pimpl& owner;
+
+        JUCE_DECLARE_NON_COPYABLE (DragInProgress)
     };
 
     void buttonClicked (Button* button)