diff --git a/express-serve-static-core/index.d.ts b/express-serve-static-core/index.d.ts
index 4066c36baf..bd8478368b 100644
--- a/express-serve-static-core/index.d.ts
+++ b/express-serve-static-core/index.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for Express 4.x
+// Type definitions for Express 4.x (core shared with serve-static)
 // Project: http://expressjs.com
 // Definitions by: Boris Yankov <https://github.com/borisyankov/>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped