diff --git a/src/js/plyr.d.ts b/src/js/plyr.d.ts
index 3be8e9e6..13523b35 100644
--- a/src/js/plyr.d.ts
+++ b/src/js/plyr.d.ts
@@ -534,7 +534,7 @@ declare namespace Plyr {
 
   interface FullScreenOptions {
     enabled?: boolean;
-    fallback?: boolean;
+    fallback?: boolean | 'force';
     allowAudio?: boolean;
     iosNative?: boolean;
   }