diff --git a/lib/controller.js b/lib/controller.js
index 9b0ce7175..4fccead20 100644
--- a/lib/controller.js
+++ b/lib/controller.js
@@ -319,7 +319,7 @@ class Controller {
                 });
 
                 // Add device linkquality.
-                if (message.linkquality) {
+                if ('linkquality' in message) {
                     payload.linkquality = message.linkquality;
                 }