diff --git a/third_party/CMakeLists.txt b/third_party/CMakeLists.txt
index c91f10a66..695a98907 100644
--- a/third_party/CMakeLists.txt
+++ b/third_party/CMakeLists.txt
@@ -54,9 +54,6 @@ else()
     else()
       list(APPEND AWSSDK_LIBRARIES ${aws_cpp_sdk_INSTALL}/lib/lib${lib}.a)
     endif()
-    if(MSVC)
-      target_compile_options(lib/${lib}.lib PRIVATE /W3 /WX)
-    endif()
   endforeach()
 
   if(UNIX AND NOT APPLE)
@@ -68,7 +65,7 @@ else()
     aws_sdk
     SOURCE_DIR ${aws_cpp_sdk_SOURCE_DIR}
     INSTALL_DIR ${aws_cpp_sdk_INSTALL}
-    CMAKE_ARGS "-DBUILD_SHARED_LIBS=OFF" "-DBUILD_ONLY=transfer;s3" "-DENABLE_TESTING=OFF" "-DCMAKE_BUILD_TYPE=Release" "-DCMAKE_INSTALL_PREFIX=${aws_cpp_sdk_INSTALL}" "-DCMAKE_INSTALL_LIBDIR=lib"
+    CMAKE_ARGS "-DBUILD_SHARED_LIBS=OFF" "-DBUILD_ONLY=transfer;s3" "-DENABLE_TESTING=OFF" "-DCMAKE_BUILD_TYPE=Release" "-DCMAKE_INSTALL_PREFIX=${aws_cpp_sdk_INSTALL}" "-DCMAKE_INSTALL_LIBDIR=lib" "-DCMAKE_CXX_FLAGS=\W3 \WX"
     BUILD_BYPRODUCTS ${AWSSDK_LIBRARIES}
     )
 endif()