diff --git a/docs/pages/index/README.md b/docs/pages/index/README.md
index a2ee7f98..3c0f2196 100644
--- a/docs/pages/index/README.md
+++ b/docs/pages/index/README.md
@@ -232,7 +232,7 @@ from maix import camera, display, image, nn
 
 classifier = nn.Classifier(model="/root/models/mobilenetv2.mud")
 cam = camera.Camera(classifier.input_width(), classifier.input_height(), classifier.input_format())
-dis = display.Display()
+disp = display.Display()
 
 while 1:
     img = cam.read()
@@ -240,7 +240,7 @@ while 1:
     max_idx, max_prob = res[0]
     msg = f"{max_prob:5.2f}: {classifier.labels[max_idx]}"
     img.draw_string(10, 10, msg, image.COLOR_RED)
-    dis.show(img)
+    disp.show(img)
 ```
 
 </div>
diff --git a/docs/pages/index_zh/README.md b/docs/pages/index_zh/README.md
index df0d0d12..47652f41 100644
--- a/docs/pages/index_zh/README.md
+++ b/docs/pages/index_zh/README.md
@@ -232,7 +232,7 @@ from maix import camera, display, image, nn
 
 classifier = nn.Classifier(model="/root/models/mobilenetv2.mud")
 cam = camera.Camera(classifier.input_width(), classifier.input_height(), classifier.input_format())
-dis = display.Display()
+disp = display.Display()
 
 while 1:
     img = cam.read()
@@ -240,7 +240,7 @@ while 1:
     max_idx, max_prob = res[0]
     msg = f"{max_prob:5.2f}: {classifier.labels[max_idx]}"
     img.draw_string(10, 10, msg, image.COLOR_RED)
-    dis.show(img)
+    disp.show(img)
 ```
 
 </div>