diff --git a/types/jquery/index.d.ts b/types/jquery/index.d.ts
index 72dff2b418..ae9f6f93d5 100644
--- a/types/jquery/index.d.ts
+++ b/types/jquery/index.d.ts
@@ -6361,7 +6361,9 @@ declare namespace JQuery {
         };
 
         // Writable properties on XMLHttpRequest
-        interface XHRFields extends Partial<Pick<XMLHttpRequest, 'onreadystatechange' | 'responseType' | 'timeout' | 'withCredentials' | 'msCaching'>> { }
+        interface XHRFields extends Partial<Pick<XMLHttpRequest, 'onreadystatechange' | 'responseType' | 'timeout' | 'withCredentials'>> {
+            msCaching?: string;
+        }
     }
 
     interface Transport {