diff --git a/axe.d.ts b/axe.d.ts
index 432afac435..8acf77a8b0 100644
--- a/axe.d.ts
+++ b/axe.d.ts
@@ -199,6 +199,7 @@ declare namespace axe {
     locale?: Locale;
     disableOtherRules?: boolean;
     axeVersion?: string;
+    noHtml?: boolean;
     // Deprecated - do not use.
     ver?: string;
   }