diff --git a/cmds/lshal/utils.h b/cmds/lshal/utils.h
index 7eca14e..c09e8b1 100644
--- a/cmds/lshal/utils.h
+++ b/cmds/lshal/utils.h
@@ -44,6 +44,8 @@
     NO_INTERFACE                            = 1 << 7,
     // Transaction error from hwbinder transactions
     TRANSACTION_ERROR                       = 1 << 8,
+    // No transaction error, but return value is unexpected.
+    BAD_IMPL                                = 1 << 9,
 };
 using Status = unsigned int;