diff --git a/server.js b/server.js
index 1277220..362cd8e 100644
--- a/server.js
+++ b/server.js
@@ -35,7 +35,7 @@ const sensehat = {
             flipV(redraw=true)  垂直反转
             setRotation(r, redraw=true)  设置旋转，r初始为0，r只能设置为0/90/180/270
         */
-        get pixels() { return this.led.getPixels() },
+        get pixels() { return self.led.getPixels() },
     },
 }