diff --git a/index.d.ts b/index.d.ts
index 63556864b1..381b1b16d0 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -359,6 +359,8 @@ declare namespace dashjs {
 
     export type CapabilitiesFilter = (representation: Representation) => boolean;
 
+    export type TrackSelectionFunction = (tracks: MediaInfo[]) => MediaInfo[];
+
     export interface MediaPlayerClass {
         initialize(view?: HTMLElement, source?: string, autoPlay?: boolean): void;
 
@@ -584,6 +586,10 @@ declare namespace dashjs {
 
         unregisterCustomCapabilitiesFilter(filter: CapabilitiesFilter): void,
 
+        setCustomInitialTrackSelectionFunction(fn: TrackSelectionFunction): void,
+
+        resetCustomInitialTrackSelectionFunction(fn: TrackSelectionFunction): void,
+
         attachTTMLRenderingDiv(div: HTMLDivElement): void;
 
         getCurrentTextTrackIndex(): number;
diff --git a/src/streaming/controllers/MediaController.js b/src/streaming/controllers/MediaController.js
index ad0aabfe2f..43969f557f 100644
--- a/src/streaming/controllers/MediaController.js
+++ b/src/streaming/controllers/MediaController.js
@@ -286,7 +286,6 @@ function MediaController() {
     function reset() {
         tracks = {};
         lastSelectedTracks = {};
-        customInitialTrackSelectionFunction = null;
         resetInitialSettings();
     }