diff --git a/dbms/src/Storages/MergeTree/MergeTreeDataMergerMutator.cpp b/dbms/src/Storages/MergeTree/MergeTreeDataMergerMutator.cpp
index faa4ca6f1e0..03805c33374 100644
--- a/dbms/src/Storages/MergeTree/MergeTreeDataMergerMutator.cpp
+++ b/dbms/src/Storages/MergeTree/MergeTreeDataMergerMutator.cpp
@@ -898,7 +898,7 @@ MergeTreeData::MutableDataPartPtr MergeTreeDataMergerMutator::mutatePartToTempor
             [&] (const MutationCommand & command)
             {
                 return command.partition == nullptr ||
-                    future_part.parts[0]->info.partition_id != data.getPartitionIDFromQuery(
+                    future_part.parts[0]->info.partition_id == data.getPartitionIDFromQuery(
                             command.partition, context_for_reading);
             });