diff --git a/guide/src/contributing/design/js-objects-in-rust.md b/guide/src/contributing/design/js-objects-in-rust.md
index dc533a4a6ea..4cc28092324 100644
--- a/guide/src/contributing/design/js-objects-in-rust.md
+++ b/guide/src/contributing/design/js-objects-in-rust.md
@@ -37,7 +37,7 @@ notably means that it can't persist the object past the lifetime of this
 function call.
 
 Now what we actually want to generate is a JS module that looks like (in
-Typescript parlance)
+TypeScript parlance)
 
 ```ts
 // foo.d.ts