diff --git a/jquery/jquery.d.ts b/jquery/jquery.d.ts
index 6d8551f44b..b378dfd0ac 100644
--- a/jquery/jquery.d.ts
+++ b/jquery/jquery.d.ts
@@ -1512,19 +1512,37 @@ interface JQuery {
      *
      * @param func A function returning the value to set. this is the current element. Receives the index position of the element in the set and the old value as arguments.
      */
-    val(func: (index: number, value: string) => any): JQuery;
+    val(func: (index: number, value: string) => string): JQuery;
     /**
      * Set the value of each element in the set of matched elements.
      *
      * @param func A function returning the value to set. this is the current element. Receives the index position of the element in the set and the old value as arguments.
      */
-    val(func: (index: number, value: string[]) => any): JQuery;
+    val(func: (index: number, value: string[]) => string): JQuery;
     /**
      * Set the value of each element in the set of matched elements.
      *
      * @param func A function returning the value to set. this is the current element. Receives the index position of the element in the set and the old value as arguments.
      */
-    val(func: (index: number, value: number) => any): JQuery;
+    val(func: (index: number, value: number) => string): JQuery;
+    /**
+     * Set the value of each element in the set of matched elements.
+     *
+     * @param func A function returning the value to set. this is the current element. Receives the index position of the element in the set and the old value as arguments.
+     */
+    val(func: (index: number, value: string) => string[]): JQuery;
+    /**
+     * Set the value of each element in the set of matched elements.
+     *
+     * @param func A function returning the value to set. this is the current element. Receives the index position of the element in the set and the old value as arguments.
+     */
+    val(func: (index: number, value: string[]) => string[]): JQuery;
+    /**
+     * Set the value of each element in the set of matched elements.
+     *
+     * @param func A function returning the value to set. this is the current element. Receives the index position of the element in the set and the old value as arguments.
+     */
+    val(func: (index: number, value: number) => string[]): JQuery;
 
     /**
      * Get the value of style properties for the first element in the set of matched elements.