diff --git a/lib/carrierwave/storage/grid_fs.rb b/lib/carrierwave/storage/grid_fs.rb
index 6ed432a..d0244fb 100644
--- a/lib/carrierwave/storage/grid_fs.rb
+++ b/lib/carrierwave/storage/grid_fs.rb
@@ -52,7 +52,7 @@ def url
           unless @uploader.grid_fs_access_url
             nil
           else
-            [@uploader.grid_fs_access_url, @path].join("/")
+            [@uploader.grid_fs_access_url, @path].join("/").squeeze("/")
           end
         end