diff --git a/dbms/src/Processors/Formats/IOutputFormat.h b/dbms/src/Processors/Formats/IOutputFormat.h
index 55555717070..63561749a7c 100644
--- a/dbms/src/Processors/Formats/IOutputFormat.h
+++ b/dbms/src/Processors/Formats/IOutputFormat.h
@@ -64,8 +64,8 @@ public:
 
     void write(const Block & block) { consume(Chunk(block.getColumns(), block.rows())); }
 
-    void writePrefix() {}
-    void writeSuffix() { finalize(); }
+    void doWritePrefix() {}
+    void doWriteSuffix() { finalize(); }
 
     void setTotals(const Block & totals) { consume(Chunk(totals.getColumns(), totals.rows())); }
     void setExtremes(const Block & extremes) { consume(Chunk(extremes.getColumns(), extremes.rows())); }
diff --git a/dbms/src/Processors/Formats/OutputStreamToOutputFormat.cpp b/dbms/src/Processors/Formats/OutputStreamToOutputFormat.cpp
index 153972fc65d..7acf41f6cf7 100644
--- a/dbms/src/Processors/Formats/OutputStreamToOutputFormat.cpp
+++ b/dbms/src/Processors/Formats/OutputStreamToOutputFormat.cpp
@@ -14,8 +14,8 @@ void OutputStreamToOutputFormat::write(const Block & block)
     output_format->write(block);
 }
 
-void OutputStreamToOutputFormat::writePrefix() { output_format->writePrefix(); }
-void OutputStreamToOutputFormat::writeSuffix() { output_format->writeSuffix(); }
+void OutputStreamToOutputFormat::writePrefix() { output_format->doWritePrefix(); }
+void OutputStreamToOutputFormat::writeSuffix() { output_format->doWriteSuffix(); }
 
 void OutputStreamToOutputFormat::flush() { output_format->flush(); }