diff --git a/binder_bindings/android/brillo/IUpdateEngine.aidl b/binder_bindings/android/brillo/IUpdateEngine.aidl
index 9399ce3..1c0a3e5 100644
--- a/binder_bindings/android/brillo/IUpdateEngine.aidl
+++ b/binder_bindings/android/brillo/IUpdateEngine.aidl
@@ -36,4 +36,5 @@
   String GetPrevVersion();
   String GetRollbackPartition();
   void RegisterStatusCallback(in IUpdateEngineStatusCallback callback);
+  int GetLastAttemptError();
 }