diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/bubbles/BubbleStackView.java b/libs/WindowManager/Shell/src/com/android/wm/shell/bubbles/BubbleStackView.java
index 474430eb44ab6..2e8a1d76a9648 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/bubbles/BubbleStackView.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/bubbles/BubbleStackView.java
@@ -450,7 +450,11 @@ public void setValue(Object o, float v) {
                 @Override
                 public void onStuckToTarget(@NonNull MagnetizedObject.MagneticTarget target,
                         @NonNull MagnetizedObject draggedObject) {
-                    if (draggedObject.getUnderlyingObject() instanceof View view) {
+                    // Plain instanceof + cast, not instanceof-pattern -- protologtool's
+                    // bundled Java source parser (scans this whole module for ProtoLog
+                    // calls) doesn't support Java 16 instanceof pattern variables.
+                    if (draggedObject.getUnderlyingObject() instanceof View) {
+                        View view = (View) draggedObject.getUnderlyingObject();
                         animateDismissBubble(view, true);
                     }
                 }
@@ -459,7 +463,8 @@ public void onStuckToTarget(@NonNull MagnetizedObject.MagneticTarget target,
                 public void onUnstuckFromTarget(@NonNull MagnetizedObject.MagneticTarget target,
                         @NonNull MagnetizedObject draggedObject,
                         float velX, float velY, boolean wasFlungOut) {
-                    if (draggedObject.getUnderlyingObject() instanceof View view) {
+                    if (draggedObject.getUnderlyingObject() instanceof View) {
+                        View view = (View) draggedObject.getUnderlyingObject();
                         animateDismissBubble(view, false);
 
                         if (wasFlungOut) {
@@ -474,7 +479,8 @@ public void onUnstuckFromTarget(@NonNull MagnetizedObject.MagneticTarget target,
                 @Override
                 public void onReleasedInTarget(@NonNull MagnetizedObject.MagneticTarget target,
                         @NonNull MagnetizedObject<?> draggedObject) {
-                    if (draggedObject.getUnderlyingObject() instanceof View view) {
+                    if (draggedObject.getUnderlyingObject() instanceof View) {
+                        View view = (View) draggedObject.getUnderlyingObject();
                         mExpandedAnimationController.dismissDraggedOutBubble(
                                 view /* bubble */,
                                 mDismissView.getHeight() /* translationYBy */,