diff --git a/src/controller/buffer-controller.ts b/src/controller/buffer-controller.ts
index 4060903f695..f71c65bed49 100755
--- a/src/controller/buffer-controller.ts
+++ b/src/controller/buffer-controller.ts
@@ -1027,7 +1027,7 @@ export default class BufferController implements ComponentAPI {
 
   private get mediaSrc(): string | undefined {
     if (!this.media) return undefined;
-    const media = getSourceChild(this.media) || this.media;
+    const media = this.media.querySelector?.('source') || this.media;
     return media.src;
   }
 
@@ -1195,7 +1195,3 @@ function addSource(media: HTMLMediaElement, url: string) {
   source.src = url;
   media.appendChild(source);
 }
-
-function getSourceChild(media: HTMLMediaElement): HTMLSourceElement | null {
-  return media.querySelector?.('source');
-}