diff --git a/graphics/java/android/graphics/drawable/RippleDrawable.java b/graphics/java/android/graphics/drawable/RippleDrawable.java
index 134451b..63698337 100644
--- a/graphics/java/android/graphics/drawable/RippleDrawable.java
+++ b/graphics/java/android/graphics/drawable/RippleDrawable.java
@@ -423,6 +423,7 @@
         if (super.setDrawableByLayerId(id, drawable)) {
             if (id == R.id.mask) {
                 mMask = drawable;
+                mHasValidMask = false;
             }
 
             return true;