diff --git a/dbms/src/IO/WriteBufferFromVector.h b/dbms/src/IO/WriteBufferFromVector.h
index 3b6f75f354e..70e6ef5e36e 100644
--- a/dbms/src/IO/WriteBufferFromVector.h
+++ b/dbms/src/IO/WriteBufferFromVector.h
@@ -52,6 +52,8 @@ public:
 
     void finish()
     {
+        if (is_finished)
+            return;
         is_finished = true;
         vector.resize(
             ((position() - reinterpret_cast<Position>(vector.data()))