diff --git a/src/IO/LZMADeflatingWriteBuffer.h b/src/IO/LZMADeflatingWriteBuffer.h
index ca3573bbf8cf45e5d74479a2115aba789e5bcb88..efa4532d372c7730b5cfb0e22b38676d9f68238e 100644
--- a/src/IO/LZMADeflatingWriteBuffer.h
+++ b/src/IO/LZMADeflatingWriteBuffer.h
@@ -55,9 +55,6 @@ public:
     {
         throw Exception("LZMADeflatingWriteBuffer is not implemented for arcadia build", ErrorCodes::NOT_IMPLEMENTED);
     }
-
-private:
-    void nextImpl() override {}
 };
 
 #endif
diff --git a/src/IO/LZMAInflatingReadBuffer.h b/src/IO/LZMAInflatingReadBuffer.h
index d591b6eeb8e2b23d56ad7a8e7857ff6a22c1bae0..46bd5d83183f7b3bd70272026cafe345a74e441e 100644
--- a/src/IO/LZMAInflatingReadBuffer.h
+++ b/src/IO/LZMAInflatingReadBuffer.h
@@ -49,9 +49,6 @@ public:
     {
         throw Exception("LZMADeflatingWriteBuffer is not implemented for arcadia build", ErrorCodes::NOT_IMPLEMENTED);
     }
-
-private:
-    bool nextImpl() override {}
 };
 
 #endif