diff --git a/cpp/cmake/DefineOptions.cmake b/cpp/cmake/DefineOptions.cmake
index 1873688a1785867f55e04047939d385dee0828d7..82259d2eb5faab376487f803919e9b18496d9a1e 100644
--- a/cpp/cmake/DefineOptions.cmake
+++ b/cpp/cmake/DefineOptions.cmake
@@ -72,9 +72,6 @@ define_option(MILVUS_WITH_FAISS "Build with FAISS library" OFF)
 
 define_option(MILVUS_WITH_FAISS_GPU_VERSION "Build with FAISS GPU version" OFF)
 
-#define_option_string(MILVUS_FAISS_GPU_ARCH "Specifying which GPU architectures to build against"
-#        "-gencode=arch=compute_35,code=compute_35 -gencode=arch=compute_52,code=compute_52 -gencode=arch=compute_60,code=compute_60 -gencode=arch=compute_61,code=compute_61")
-
 define_option(MILVUS_WITH_LAPACK "Build with LAPACK library" OFF)
 
 define_option(MILVUS_WITH_LZ4 "Build with lz4 compression" ON)
diff --git a/cpp/src/CMakeLists.txt b/cpp/src/CMakeLists.txt
index 1a770ef2adeef7c5c916713f7a793ea05e606778..6a7fb6835e60d553cb31aa0adad243d008918225 100644
--- a/cpp/src/CMakeLists.txt
+++ b/cpp/src/CMakeLists.txt
@@ -137,7 +137,6 @@ endif ()
 
 
 cuda_add_library(milvus_engine STATIC ${engine_files})
-#cuda_add_library(milvus_engine SHARED ${engine_files})
 target_link_libraries(milvus_engine ${engine_libs} ${third_party_libs})
 
 add_library(metrics STATIC ${metrics_files})