diff --git a/src/api-impl/android/graphics/Bitmap.java b/src/api-impl/android/graphics/Bitmap.java
index e8fd6c50..9c6ae44d 100644
--- a/src/api-impl/android/graphics/Bitmap.java
+++ b/src/api-impl/android/graphics/Bitmap.java
@@ -184,6 +184,10 @@ public final class Bitmap {
 		return getAllocationByteCount();
 	}
 
+	public boolean isMutable() {
+		return true;
+	}
+
 	@SuppressWarnings("deprecation")
 	@Override
 	protected void finalize() throws Throwable {