diff --git a/internal/core/src/index/thirdparty/CMakeLists.txt b/internal/core/src/index/thirdparty/CMakeLists.txt
index 3035c76e60..d6f539bc22 100644
--- a/internal/core/src/index/thirdparty/CMakeLists.txt
+++ b/internal/core/src/index/thirdparty/CMakeLists.txt
@@ -105,7 +105,7 @@ macro(build_faiss)
 
     message(STATUS "Building FAISS with configure args -${FAISS_CONFIGURE_ARGS}")
 	
-	//Notice: there will not set LDFLAGS value
+    #Notice: there will not set LDFLAGS value
     if (DEFINED ENV{FAISS_SOURCE_URL})
         set(FAISS_SOURCE_URL "$ENV{FAISS_SOURCE_URL}")
         externalproject_add(faiss_ep