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-rw-r--r--actionpack/lib/action_dispatch/http/mime_negotiation.rb4
1 files changed, 2 insertions, 2 deletions
diff --git a/actionpack/lib/action_dispatch/http/mime_negotiation.rb b/actionpack/lib/action_dispatch/http/mime_negotiation.rb
index 004713ec1a..0152c17ed4 100644
--- a/actionpack/lib/action_dispatch/http/mime_negotiation.rb
+++ b/actionpack/lib/action_dispatch/http/mime_negotiation.rb
@@ -67,8 +67,8 @@ module ActionDispatch
v = if params_readable
Array(Mime[parameters[:format]])
- elsif format_from_path_extension
- [Mime[format_from_path_extension]]
+ elsif format = format_from_path_extension
+ Array(Mime[format])
elsif use_accept_header && valid_accept_header
accepts
elsif xhr?