diff --git a/types/showdown/index.d.ts b/types/showdown/index.d.ts
index 6e2b86cccc..1e3cff5774 100644
--- a/types/showdown/index.d.ts
+++ b/types/showdown/index.d.ts
@@ -294,6 +294,14 @@ declare namespace Showdown {
          */
         makeHtml(text: string): string;
 
+        /**
+         * Converts an HTML string into a markdown string
+         * 
+         * @param src
+         * @returns {string}
+         */
+        makeMarkdown(src: string): string;
+
         /**
          * Setting a "local" option only affects the specified Converter object.
          *