diff --git a/nprogress/NProgress.d.ts b/nprogress/NProgress.d.ts
index a86558aae7..6bad4cfd1f 100644
--- a/nprogress/NProgress.d.ts
+++ b/nprogress/NProgress.d.ts
@@ -23,6 +23,13 @@ interface NProgressStatic {
      */
     inc(): NProgressStatic;
 
+    /**
+     * Increments the progress bar with a set amount.
+     * @param {number} amount This will get the current status value and adds the value until status is max 0.994
+     * @returns {NProgressConfigureOptions} The current NProgress object, useful for chaining.
+     */
+    inc(amount: number): NProgressStatic;
+
     /**
      * Removes the progress indicator.
      */
@@ -102,4 +109,4 @@ interface NProgressConfigureOptions {
     template?: string;
 }
 
-declare var NProgress: NProgressStatic;
\ No newline at end of file
+declare var NProgress: NProgressStatic;