diff --git a/nano/slow_test/node.cpp b/nano/slow_test/node.cpp
index d6fb854f12..0ae95217a0 100644
--- a/nano/slow_test/node.cpp
+++ b/nano/slow_test/node.cpp
@@ -1913,9 +1913,9 @@ TEST (node, mass_epoch_upgrader)
 		{
 			auto const pre_upgrade = node.ledger.cache.block_count.load ();
 			auto upgrade_count = std::min<size_t> (batch_size, block_count_before + total_to_upgrade - pre_upgrade);
-			ASSERT_FALSE (node.epoch_upgrader (epoch_signer.prv, nano::epoch::epoch_1, upgrade_count, threads));
+			ASSERT_FALSE (node.epoch_upgrader.start (epoch_signer.prv, nano::epoch::epoch_1, upgrade_count, threads));
 			// Already ongoing - should fail
-			ASSERT_TRUE (node.epoch_upgrader (epoch_signer.prv, nano::epoch::epoch_1, upgrade_count, threads));
+			ASSERT_TRUE (node.epoch_upgrader.start (epoch_signer.prv, nano::epoch::epoch_1, upgrade_count, threads));
 			system.deadline_set (60s);
 			while (node.ledger.cache.block_count != pre_upgrade + upgrade_count)
 			{