diff --git a/dbms/src/DataStreams/ReverseBlockInputStream.cpp b/dbms/src/DataStreams/ReverseBlockInputStream.cpp
index fe2b713ae07..009e3403ff9 100644
--- a/dbms/src/DataStreams/ReverseBlockInputStream.cpp
+++ b/dbms/src/DataStreams/ReverseBlockInputStream.cpp
@@ -27,19 +27,20 @@ namespace DB
             return Block();
         }
 
-        PaddedPODArray<size_t> permutation;
+        IColumn::Permutation permutation;
 
-        for (size_t i = 0; i < result_block.rows(); ++i)
+        size_t rows_size = result_block.rows();
+        for (size_t i = 0; i < rows_size; ++i)
         {
-            permutation.emplace_back(result_block.rows() - 1 - i);
+            permutation.emplace_back(rows_size - 1 - i);
         }
 
-        for (auto iter = result_block.begin(); iter != result_block.end(); ++iter)
+        for (auto& block : result_block)
         {
-            iter->column = iter->column->permute(permutation, 0);
+            block.column = block.column->permute(permutation, 0);
         }
 
         return result_block;
     }
 
-} // namespace DB
+}
diff --git a/dbms/src/DataStreams/ReverseBlockInputStream.h b/dbms/src/DataStreams/ReverseBlockInputStream.h
index 8d00a158a2a..8a040d03457 100644
--- a/dbms/src/DataStreams/ReverseBlockInputStream.h
+++ b/dbms/src/DataStreams/ReverseBlockInputStream.h
@@ -12,10 +12,10 @@ namespace DB
 class ReverseBlockInputStream : public IBlockInputStream
 {
 public:
-    ReverseBlockInputStream(const BlockInputStreamPtr& input);
+    ReverseBlockInputStream(
+        const BlockInputStreamPtr& input);
 
     String getName() const override;
-
     Block getHeader() const override;
 
 protected: