diff --git a/cpp/src/db/DBImpl.cpp b/cpp/src/db/DBImpl.cpp
index ec5f61838146b1cc007c619e2521bd0d0c9ea76f..cba269c17bc47244c3df5b935c015cd4441daafe 100644
--- a/cpp/src/db/DBImpl.cpp
+++ b/cpp/src/db/DBImpl.cpp
@@ -2,14 +2,9 @@
 #include <chrono>
 #include <thread>
 #include <iostream>
-#include <faiss/IndexFlat.h>
-#include <faiss/MetaIndexes.h>
-#include <faiss/index_io.h>
-#include <faiss/AutoTune.h>
 #include <cstring>
 #include <wrapper/Topk.h>
 #include <easylogging++.h>
-#include <wrapper/IndexBuilder.h>
 #include <cache/CpuCacheMgr.h>
 
 #include "DBImpl.h"
diff --git a/cpp/src/db/MemManager.cpp b/cpp/src/db/MemManager.cpp
index 10ec5829352ec2d3c89e98db3acfbd05df5c55ae..904c5db15088b683d0a3dbd8b75025241f715303 100644
--- a/cpp/src/db/MemManager.cpp
+++ b/cpp/src/db/MemManager.cpp
@@ -1,7 +1,6 @@
 #include <iostream>
 #include <sstream>
 #include <thread>
-
 #include <easylogging++.h>
 
 #include "MemManager.h"