diff --git a/src/Storages/StorageReplicatedMergeTree.cpp b/src/Storages/StorageReplicatedMergeTree.cpp
index 7a63c2ee8c0..a79fe768940 100644
--- a/src/Storages/StorageReplicatedMergeTree.cpp
+++ b/src/Storages/StorageReplicatedMergeTree.cpp
@@ -663,6 +663,7 @@ void StorageReplicatedMergeTree::waitMutationToFinishOnReplicas(
         /// they will happen on each replica, so we can check only in-memory info.
         auto mutation_status = queue.getIncompleteMutationsStatus(mutation_id, &mutation_ids);
         checkMutationStatus(mutation_status, mutation_ids);
+        chassert(mutation_status.is_done);
     }
 
     if (!inactive_replicas.empty())