diff --git a/tools/layoutlib/bridge/src/android/graphics/Bitmap_Delegate.java b/tools/layoutlib/bridge/src/android/graphics/Bitmap_Delegate.java
index 6d8ecd7c1b968..f1da3a266448c 100644
--- a/tools/layoutlib/bridge/src/android/graphics/Bitmap_Delegate.java
+++ b/tools/layoutlib/bridge/src/android/graphics/Bitmap_Delegate.java
@@ -302,6 +302,13 @@ public final class Bitmap_Delegate {
         return null;
     }
 
+    @LayoutlibDelegate
+    /*package*/ static Bitmap nativeCopyAshmemConfig(long nativeSrcBitmap, int nativeConfig) {
+        // Unused method; no implementation provided.
+        assert false;
+        return null;
+    }
+
     @LayoutlibDelegate
     /*package*/ static long nativeGetNativeFinalizer() {
         synchronized (Bitmap_Delegate.class) {