diff --git a/app/src/main/kotlin/com/simplemobiletools/gallery/pro/activities/ViewPagerActivity.kt b/app/src/main/kotlin/com/simplemobiletools/gallery/pro/activities/ViewPagerActivity.kt
index 988a2fecf..a52545aff 100644
--- a/app/src/main/kotlin/com/simplemobiletools/gallery/pro/activities/ViewPagerActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/gallery/pro/activities/ViewPagerActivity.kt
@@ -95,7 +95,7 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
         window.decorView.setBackgroundColor(getProperBackgroundColor())
         top_shadow.layoutParams.height = statusBarHeight + actionBarHeight
         checkNotchSupport()
-        (MediaActivity.mMedia.clone() as ArrayList<ThumbnailItem>).filter { it is Medium }.mapTo(mMediaFiles) { it as Medium }
+        (MediaActivity.mMedia.clone() as ArrayList<ThumbnailItem>).filterIsInstanceTo(mMediaFiles, Medium::class.java)
 
         handlePermission(PERMISSION_WRITE_STORAGE) {
             if (it) {