diff --git a/app/src/main/java/app/grapheneos/pdfviewer/PdfViewer.java b/app/src/main/java/app/grapheneos/pdfviewer/PdfViewer.java
index ad8ef55..ca2ad96 100644
--- a/app/src/main/java/app/grapheneos/pdfviewer/PdfViewer.java
+++ b/app/src/main/java/app/grapheneos/pdfviewer/PdfViewer.java
@@ -569,12 +569,12 @@ public class PdfViewer extends AppCompatActivity implements LoaderManager.Loader
     }
 
     private void showSystemUi() {
-        ViewKt.showSystemUi(binding.getRoot());
+        ViewKt.showSystemUi(binding.getRoot(), getWindow());
         getSupportActionBar().show();
     }
 
     private void hideSystemUi() {
-        ViewKt.hideSystemUi(binding.getRoot());
+        ViewKt.hideSystemUi(binding.getRoot(), getWindow());
         getSupportActionBar().hide();
     }
 
diff --git a/app/src/main/java/app/grapheneos/pdfviewer/ktx/View.kt b/app/src/main/java/app/grapheneos/pdfviewer/ktx/View.kt
index 435e78e..deb3038 100644
--- a/app/src/main/java/app/grapheneos/pdfviewer/ktx/View.kt
+++ b/app/src/main/java/app/grapheneos/pdfviewer/ktx/View.kt
@@ -1,19 +1,20 @@
 package app.grapheneos.pdfviewer.ktx
 
 import android.view.View
-import androidx.core.view.ViewCompat
+import android.view.Window
+import androidx.core.view.WindowCompat
 import androidx.core.view.WindowInsetsCompat
 import androidx.core.view.WindowInsetsControllerCompat
 
 private val systemBars = WindowInsetsCompat.Type.statusBars()
 
-fun View.hideSystemUi() {
-    val controller = ViewCompat.getWindowInsetsController(this) ?: return
+fun View.hideSystemUi(window: Window) {
+    val controller = WindowCompat.getInsetsController(window, this)
     controller.systemBarsBehavior =
         WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
     controller.hide(systemBars)
 }
 
-fun View.showSystemUi() {
-    ViewCompat.getWindowInsetsController(this)?.show(systemBars)
+fun View.showSystemUi(window: Window) {
+    WindowCompat.getInsetsController(window, this).show(systemBars)
 }