diff --git a/packages/SystemUI/src/com/android/systemui/ScreenDecorations.java b/packages/SystemUI/src/com/android/systemui/ScreenDecorations.java
index 7861211e802da..b167750c63e87 100644
--- a/packages/SystemUI/src/com/android/systemui/ScreenDecorations.java
+++ b/packages/SystemUI/src/com/android/systemui/ScreenDecorations.java
@@ -436,6 +436,9 @@ public class ScreenDecorations extends SystemUI implements Tunable {
         lp.privateFlags |= WindowManager.LayoutParams.SYSTEM_FLAG_SHOW_FOR_ALL_USERS
                 | WindowManager.LayoutParams.PRIVATE_FLAG_NO_MOVE_ANIMATION;
 
+        // FLAG_SLIPPERY can only be set by trusted overlays
+        lp.privateFlags |= WindowManager.LayoutParams.PRIVATE_FLAG_TRUSTED_OVERLAY;
+
         if (!DEBUG_SCREENSHOT_ROUNDED_CORNERS) {
             lp.privateFlags |= WindowManager.LayoutParams.PRIVATE_FLAG_IS_ROUNDED_CORNERS_OVERLAY;
         }