diff --git a/src/Storages/Cache/ExternalDataSourceCache.h b/src/Storages/Cache/ExternalDataSourceCache.h
index 468cf3c300d..740bd820d40 100644
--- a/src/Storages/Cache/ExternalDataSourceCache.h
+++ b/src/Storages/Cache/ExternalDataSourceCache.h
@@ -29,10 +29,6 @@
 namespace DB
 {
 
-/*
- * FIXME:RemoteReadBuffer derive from SeekableReadBufferWithSize may cause some risks, since it's not seekable in some cases
- * But SeekableReadBuffer is not a interface which make it hard to fixup.
- */
 class RemoteReadBuffer : public BufferWithOwnMemory<SeekableReadBufferWithSize>
 {
 public: