diff --git a/tests/core_tests/hard_fork_4.h b/tests/core_tests/hard_fork_4.h
index bf12419f..f8235675 100644
--- a/tests/core_tests/hard_fork_4.h
+++ b/tests/core_tests/hard_fork_4.h
@@ -13,6 +13,7 @@ struct hard_fork_4_consolidated_txs : public wallet_test
   bool c1(currency::core& c, size_t ev_index, const std::vector<test_event_entry>& events);
 
   mutable bool m_post_hf4_zarcanum = false;
+  mutable uint64_t m_bob_amount = 0;
 };