diff --git a/docfx_project/examples/index.md b/docfx_project/examples/index.md
index 3d1ba0c69..25a45d85f 100644
--- a/docfx_project/examples/index.md
+++ b/docfx_project/examples/index.md
@@ -20,7 +20,7 @@ await page.ScreenshotAsync(outputFile);
 You can also change the view port before generating the screenshot
 
 ```cs
-await page.SetViewport(new ViewPortOptions
+await page.SetViewportAsync(new ViewPortOptions
 {
     Width = 500,
     Height = 500