diff --git a/lib/guard/rails/runner.rb b/lib/guard/rails/runner.rb
index 5098ebb..9323a60 100644
--- a/lib/guard/rails/runner.rb
+++ b/lib/guard/rails/runner.rb
@@ -58,7 +58,7 @@ module Guard
     end
 
     def wait_for_pid_action
-      0.5
+      sleep 0.5
     end
 
     def kill_unmanaged_pid!