diff --git a/lib/monitor/run.js b/lib/monitor/run.js
index 36a4864a..6e1fa24d 100644
--- a/lib/monitor/run.js
+++ b/lib/monitor/run.js
@@ -64,7 +64,7 @@ function run(options) {
 
   const spawnOptions = {
     env: Object.assign({}, process.env, options.execOptions.env, {
-      PATH: binPath + ':' + process.env.PATH,
+      PATH: binPath + path.delimiter + process.env.PATH,
     }),
     stdio: stdio,
   };