diff --git a/doc/api/vm.md b/doc/api/vm.md
index d3be08f89b377a..7d14293ac4e45b 100644
--- a/doc/api/vm.md
+++ b/doc/api/vm.md
@@ -758,7 +758,7 @@ console.log(util.inspect(sandbox));
 // { globalVar: 1024 }
 ```
 
-## vm.runInNewContext(code[, sandbox][, options])
+## vm.runInNewContext(code[, sandbox[, options]])
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