diff --git a/cli/dts/lib.deno.ns.d.ts b/cli/dts/lib.deno.ns.d.ts
index e3a59ac78f..c56371a23b 100644
--- a/cli/dts/lib.deno.ns.d.ts
+++ b/cli/dts/lib.deno.ns.d.ts
@@ -84,6 +84,7 @@ declare namespace Deno {
     BadResource: ErrorConstructor;
     Http: ErrorConstructor;
     Busy: ErrorConstructor;
+    NotSupported: ErrorConstructor;
   };
 
   /** The current process id of the runtime. */