diff --git a/src/apphealthmonitor.js b/src/apphealthmonitor.js
index f496db5b9..7a26c4b05 100644
--- a/src/apphealthmonitor.js
+++ b/src/apphealthmonitor.js
@@ -194,7 +194,7 @@ function stop(callback) {
     assert.strictEqual(typeof callback, 'function');
 
     clearTimeout(gRunTimeout);
-    gDockerEventStream.end();
+    if (gDockerEventStream) gDockerEventStream.end();
 
     callback();
 }