diff --git a/src/pyj/read_book/ui.pyj b/src/pyj/read_book/ui.pyj
index c070816f51..9ea2f9815f 100644
--- a/src/pyj/read_book/ui.pyj
+++ b/src/pyj/read_book/ui.pyj
@@ -470,7 +470,7 @@ class ReadUI:
 
         for fname in files_left:
             if fname is not raster_cover_name:
-                start_download(fname, base_path + encodeURIComponent(fname).replace(/%2[fF]/, '/'))
+                start_download(fname, base_path + encodeURIComponent(fname).replace(/%2[fF]/g, '/'))
 
     def ensure_maths(self, proceed):
         self.db.get_mathjax_info(def(mathjax_info):