diff --git a/lib/controller.js b/lib/controller.js
index 9c828794..b3fa3668 100644
--- a/lib/controller.js
+++ b/lib/controller.js
@@ -560,7 +560,7 @@ class Controller {
 
             // Update state cache with new state.
             if (cache) {
-                this.state.set(deviceID, payload);
+                this.state.set(deviceID, messagePayload);
             }
         }