diff --git a/lib/exporter.rb b/lib/exporter.rb
index 999b510d..bde198dc 100644
--- a/lib/exporter.rb
+++ b/lib/exporter.rb
@@ -11,7 +11,7 @@ class Exporter
     @user = user
     @obj = {}
     @export_dirname = Dir.mktmpdir("rs-export-")
-    @export_filename = "#{File.basename(@export_dirname)}"
+    @export_filename = File.basename(@export_dirname)
   end
 
   def export