diff --git a/documentation/Fl_Menu_Item.html b/documentation/Fl_Menu_Item.html
index 7d3ca8820..3f1fc10fd 100644
--- a/documentation/Fl_Menu_Item.html
+++ b/documentation/Fl_Menu_Item.html
@@ -285,9 +285,10 @@ does not match any shortcuts then NULL is returned. This only
matches the shortcut() fields, not the letters in the title
preceeded by '
- Return the offset of the NULL terminator that ends this menu,
-correctly skipping over submenus. To copy a menu you should copy
-size() + 1 structures.
+ Returns the number of Fl_Menu_Item structures that make up this menu,
+correctly counting submenus. This includes the "terminator" item at
+the end. So to copy a menu you need to copy
+size()*sizeof(Fl_Menu_Item) bytes.