diff --git a/src/Server/TCPHandler.h b/src/Server/TCPHandler.h
index 287f849ce4c..086c1f7d5e5 100644
--- a/src/Server/TCPHandler.h
+++ b/src/Server/TCPHandler.h
@@ -119,7 +119,7 @@ public:
     void run() override;
 
     /// This method is called right before the query execution.
-    virtual void customizeContext(ContextPtr /*context*/) {}
+    virtual void customizeContext(ContextMutablePtr /*context*/) {}
 
 private:
     IServer & server;