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-rw-r--r--actionpack/lib/action_dispatch/http/mime_type.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/actionpack/lib/action_dispatch/http/mime_type.rb b/actionpack/lib/action_dispatch/http/mime_type.rb
index 27f27e27fe..cc989d6625 100644
--- a/actionpack/lib/action_dispatch/http/mime_type.rb
+++ b/actionpack/lib/action_dispatch/http/mime_type.rb
@@ -84,7 +84,7 @@ module Mime
end
def lookup_by_extension(extension)
- EXTENSION_LOOKUP[extension]
+ EXTENSION_LOOKUP[extension.to_s]
end
# Registers an alias that's not used on mime type lookup, but can be referenced directly. Especially useful for