diff --git a/packages/SystemUI/src/com/android/systemui/bubbles/animation/AnimatableScaleMatrix.java b/packages/SystemUI/src/com/android/systemui/bubbles/animation/AnimatableScaleMatrix.java
index ae78336347940..07acb710c6d7c 100644
--- a/packages/SystemUI/src/com/android/systemui/bubbles/animation/AnimatableScaleMatrix.java
+++ b/packages/SystemUI/src/com/android/systemui/bubbles/animation/AnimatableScaleMatrix.java
@@ -134,4 +134,11 @@ public class AnimatableScaleMatrix extends Matrix {
     public float getPivotY() {
         return mPivotY;
     }
+
+    @Override
+    public boolean equals(Object obj) {
+        // Use object equality to allow this matrix to be used as a map key (which is required for
+        // PhysicsAnimator's animator caching).
+        return obj == this;
+    }
 }