diff --git a/lib/server.js b/lib/server.js
index d86fb6d..fc07994 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -128,7 +128,9 @@ Server.prototype.start = function() {
   });
 
   instance.on('close', function (code) {
-    logStream.end();
+    if (logStream) {
+      logStream.end();
+    }
 
     clearInterval(self.queryStatusInterval);
     self.state = null;