diff --git a/lib/carrierwave/utilities/uri.rb b/lib/carrierwave/utilities/uri.rb
index 81b7bc6bd..b6f000dc7 100644
--- a/lib/carrierwave/utilities/uri.rb
+++ b/lib/carrierwave/utilities/uri.rb
@@ -11,7 +11,7 @@ module Uri
     private
 
       def encode_path(path)
-        URI::DEFAULT_PARSER.escape(path, PATH_UNSAFE)
+        URI::DEFAULT_PARSER.escape(path.to_s, PATH_UNSAFE)
       end
 
       def encode_non_ascii(str)