diff --git a/lib/spring/application.rb b/lib/spring/application.rb
index 78ef21c4..eab8aebe 100644
--- a/lib/spring/application.rb
+++ b/lib/spring/application.rb
@@ -147,7 +147,7 @@ def serve(client)
       log "got client"
       manager.puts
 
-      stdout, stderr, stdin = streams = 3.times.map { client.recv_io }
+      _stdout, stderr, _stdin = streams = 3.times.map { client.recv_io }
       [STDOUT, STDERR, STDIN].zip(streams).each { |a, b| a.reopen(b) }
 
       preload unless preloaded?
diff --git a/lib/spring/application_manager.rb b/lib/spring/application_manager.rb
index 953f2685..d9d1c91e 100644
--- a/lib/spring/application_manager.rb
+++ b/lib/spring/application_manager.rb
@@ -7,6 +7,7 @@ def initialize(app_env, spring_env)
       @spring_env = spring_env
       @mutex      = Mutex.new
       @state      = :running
+      @pid        = nil
     end
 
     def log(message)