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2 files changed, 2 insertions, 1 deletions
diff --git a/lib/unicorn.rb b/lib/unicorn.rb
index e7bc9ce..85e4df1 100644
--- a/lib/unicorn.rb
+++ b/lib/unicorn.rb
@@ -2,6 +2,7 @@
 require 'etc'
 require 'stringio'
 require 'kgio'
+require 'io/wait'
   require 'rack'
diff --git a/lib/unicorn/http_server.rb b/lib/unicorn/http_server.rb
index 485cf12..b2bbddb 100644
--- a/lib/unicorn/http_server.rb
+++ b/lib/unicorn/http_server.rb
@@ -380,7 +380,7 @@ class Unicorn::HttpServer
   # wait for a signal hander to wake us up and then consume the pipe
   def master_sleep(sec)
-    @self_pipe[0].kgio_wait_readable(sec) or return
+    @self_pipe[0].wait(sec) or return
     # 11 bytes is the maximum string length which can be embedded within
     # the Ruby itself and not require a separate malloc (on 32-bit MRI 1.9+).
     # Most reads are only one byte here and uncommon, so it's not worth a