diff --git a/types/terser/index.d.ts b/types/terser/index.d.ts
index f9367436c8..ea57a27c53 100644
--- a/types/terser/index.d.ts
+++ b/types/terser/index.d.ts
@@ -3,6 +3,7 @@
 // Definitions by: JordiAnderl <https://github.com/JordiAnderl>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 3.0
+// No support for typescript version 3. See https://github.com/Microsoft/dtslint/issues/137
 
 import * as MOZ_SourceMap from "source-map";