diff --git a/lib/unicorn/worker_killer.rb b/lib/unicorn/worker_killer.rb
index 2bec0b0..a60d843 100644
--- a/lib/unicorn/worker_killer.rb
+++ b/lib/unicorn/worker_killer.rb
@@ -15,7 +15,7 @@ def self.kill_self(logger, start_time)
         sig = :KILL
       end
 
-      logger.warn "#{self} send SIGTERM (pid: #{Process.pid}) alive: #{alive_sec} sec (trial #{i})"
+      logger.warn "#{self} send SIG#{sig} (pid: #{Process.pid}) alive: #{alive_sec} sec (trial #{i})"
       Process.kill sig, Process.pid
 
       sleep 1  # TODO configurable sleep