diff --git a/dbms/src/DataStreams/FinishSortingBlockInputStream.cpp b/dbms/src/DataStreams/FinishSortingBlockInputStream.cpp
index 81aa89fa82b..d066cd89412 100644
--- a/dbms/src/DataStreams/FinishSortingBlockInputStream.cpp
+++ b/dbms/src/DataStreams/FinishSortingBlockInputStream.cpp
@@ -150,7 +150,7 @@ Block FinishSortingBlockInputStream::readImpl()
 
         if (!blocks.empty())
         {
-	    impl = std::make_unique<MergeSortingBlocksBlockInputStream>(blocks, description_to_sort, max_merged_block_size, limit);
+            impl = std::make_unique<MergeSortingBlocksBlockInputStream>(blocks, description_to_sort, max_merged_block_size, limit);
             res = impl->read();
         }
     }