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-rw-r--r--lib/raindrops/last_data_recv.rb4
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/raindrops/last_data_recv.rb b/lib/raindrops/last_data_recv.rb
index f96a776..b4808a1 100644
--- a/lib/raindrops/last_data_recv.rb
+++ b/lib/raindrops/last_data_recv.rb
@@ -73,7 +73,9 @@ class Raindrops::LastDataRecv
   # :startdoc
 
   def initialize(opts = {})
-    Raindrops::Aggregate::LastDataRecv.cornify! if defined?(Unicorn)
+    if defined?(Unicorn::HttpServer::LISTENERS)
+      Raindrops::Aggregate::LastDataRecv.cornify!
+    end
     @aggregate =
       opts[:aggregate] || Raindrops::Aggregate::LastDataRecv.default_aggregate
   end