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-rw-r--r--lib/rainbows/dev_fd_response.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/rainbows/dev_fd_response.rb b/lib/rainbows/dev_fd_response.rb
index d839803..637bcc2 100644
--- a/lib/rainbows/dev_fd_response.rb
+++ b/lib/rainbows/dev_fd_response.rb
@@ -70,7 +70,7 @@ class Rainbows::DevFdResponse < Struct.new(:app)
     end
 
     # remain Rack::Lint-compatible for people with wonky systems :P
-    unless File.exist?("/dev/fd/0")
+    unless File.directory?("/dev/fd")
       alias to_path_orig to_path
       undef_method :to_path
     end