diff --git a/src/controllers/playback/video/index.js b/src/controllers/playback/video/index.js
index f5abc652b9..efad883f20 100644
--- a/src/controllers/playback/video/index.js
+++ b/src/controllers/playback/video/index.js
@@ -1580,20 +1580,14 @@ import { setBackdropTransparency, TRANSPARENCY_LEVEL } from '../../../components
             const item = currentItem;
 
             // use markers based on chapters
-            if (item && item.Chapters && item.Chapters.length) {
-                const runtimeDuration = item.RunTimeTicks;
-
-                for (let i = 0, length = item.Chapters.length; i < length; i++) {
-                    const currentChapter = item.Chapters[i];
-
-                    const fraction = currentChapter.StartPositionTicks / runtimeDuration;
-
+            if (item?.Chapters?.length) {
+                item.Chapters.forEach(currentChapter => {
                     markers.push({
                         className: 'chapterMarker',
                         name: currentChapter.Name,
-                        progress: fraction
+                        progress: currentChapter.StartPositionTicks / item.RunTimeTicks
                     });
-                }
+                });
             }
 
             return markers;