diff --git a/cpp/src/db/MemTableFile.h b/cpp/src/db/MemTableFile.h
index 4d0011b36233f769e7aaf945a3fa0b5bb54c86a2..36d5c1bb253e02798ff07cabe414cd29587b9839 100644
--- a/cpp/src/db/MemTableFile.h
+++ b/cpp/src/db/MemTableFile.h
@@ -5,7 +5,6 @@
 #include "VectorSource.h"
 #include "ExecutionEngine.h"
 
-
 namespace zilliz {
 namespace milvus {
 namespace engine {
diff --git a/cpp/src/db/VectorSource.h b/cpp/src/db/VectorSource.h
index 7092805a6d79de741de24c078ad5e02cdfa4d15d..9d2abec3ccdbd077cff6a968c87b61d4aa99fb15 100644
--- a/cpp/src/db/VectorSource.h
+++ b/cpp/src/db/VectorSource.h
@@ -5,7 +5,6 @@
 #include "IDGenerator.h"
 #include "ExecutionEngine.h"
 
-
 namespace zilliz {
 namespace milvus {
 namespace engine {