diff --git a/lib/em-dir-watcher/platform/windows.rb b/lib/em-dir-watcher/platform/windows.rb
index 2372493..03c315b 100644
--- a/lib/em-dir-watcher/platform/windows.rb
+++ b/lib/em-dir-watcher/platform/windows.rb
@@ -32,6 +32,8 @@ def initialize path, inclusions, exclusions, &handler
 
         start_server
         setup_listener
+
+        ::Kernel.at_exit { self.stop }    # ensure kill child process
     end
 
     def when_ready_to_use &ready_to_use_handler