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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 ec09d1e..67c94d7 100644
--- a/lib/rainbows/dev_fd_response.rb
+++ b/lib/rainbows/dev_fd_response.rb
@@ -54,7 +54,7 @@ class Rainbows::DevFdResponse < Struct.new(:app)
       # we need to make sure our pipe output is Fiber-compatible
       case env["rainbows.model"]
       when :FiberSpawn, :FiberPool, :RevFiberSpawn
-        io.respond_to?(:wait_readable) or
+        io.respond_to?(:kgio_wait_readable) or
           io = Rainbows::Fiber::IO.new(io)
       when :Revactor
         io = Rainbows::Revactor::Proxy.new(io)