diff --git a/core/lib.deno_core.d.ts b/core/lib.deno_core.d.ts
index 37cd331906..dcc50d2631 100644
--- a/core/lib.deno_core.d.ts
+++ b/core/lib.deno_core.d.ts
@@ -63,6 +63,11 @@ declare namespace Deno {
      */
     function write(rid: number, buf: Uint8Array): Promise<number>;
 
+    /**
+     * Print a message to stdout or stderr
+     */
+    function print(message: string, is_err?: boolean): void;
+
     /**
      * Shutdown a resource
      */