diff --git a/Web-Browsers.md b/Web-Browsers.md
index 908a52a..d1d53ea 100644
--- a/Web-Browsers.md
+++ b/Web-Browsers.md
@@ -25,7 +25,6 @@ On both Android and iOS, touching is required to start sound. This is the browse
 
 ```
 document.getElementsByTagName("canvas")[0].getContext("webgl").getExtension('WEBGL_lose_context').loseContext()
-undefined
 ```
 
 Note that Ebiten automatically restores images when the context is lost.