diff --git a/src/pyj/book_list/top_bar.pyj b/src/pyj/book_list/top_bar.pyj
index 1270865df0..bb845ef582 100644
--- a/src/pyj/book_list/top_bar.pyj
+++ b/src/pyj/book_list/top_bar.pyj
@@ -71,7 +71,10 @@ def set_left_data(container, title='calibre', icon='heart', action=None, tooltip
                 a.setAttribute('href', interface_data.donate_link)
                 a.setAttribute('target', 'donate-to-calibre')
             if action is not None:
-                a.addEventListener('click', def(event): event.preventDefault(), action();)
+                a.addEventListener('click', def(event):
+                    event.preventDefault()
+                    action.bind(event)()
+                )
 
             if callable(title_action):
                 a = a.nextSibling
diff --git a/src/pyj/read_book/overlay.pyj b/src/pyj/read_book/overlay.pyj
index 2c51a7710f..2e87c0373f 100644
--- a/src/pyj/read_book/overlay.pyj
+++ b/src/pyj/read_book/overlay.pyj
@@ -220,11 +220,12 @@ add_extra_css(def():
 
 def simple_overlay_title(title, overlay, container):
     container.style.backgroundColor = get_color('window-background')
-    create_top_bar(container, title=title, icon='close', action=def (event):
-                    event.preventDefault()
-                    event.stopPropagation()
-                    overlay.hide_current_panel(event)
-    )
+    def action():
+        event = this
+        event.stopPropagation()
+        overlay.hide_current_panel(event)
+
+    create_top_bar(container, title=title, icon='close', action=action)
 
 
 class MainOverlay:  # {{{