diff --git a/src/IO/ZstdDeflatingWriteBuffer.h b/src/IO/ZstdDeflatingWriteBuffer.h
index 1094380a3d7..7b557b3ddba 100644
--- a/src/IO/ZstdDeflatingWriteBuffer.h
+++ b/src/IO/ZstdDeflatingWriteBuffer.h
@@ -8,7 +8,8 @@
 
 namespace DB
 {
-/// Performs compression using zlib library and writes compressed data to out_ WriteBuffer.
+
+/// Performs compression using zstd library and writes compressed data to out_ WriteBuffer.
 class ZstdDeflatingWriteBuffer : public BufferWithOwnMemory<WriteBuffer>
 {
 public:
@@ -19,7 +20,7 @@ public:
         char * existing_memory = nullptr,
         size_t alignment = 0);
 
-    /// Flush all pending data and write zlib footer to the underlying buffer.
+    /// Flush all pending data and write footer to the underlying buffer.
     /// After the first call to this function, subsequent calls will have no effect and
     /// an attempt to write to this buffer will result in exception.
     void finish();