diff --git a/config/win/visual_studio_version.gni b/config/win/visual_studio_version.gni
index bd41166..003a6ac 100644
--- a/config/win/visual_studio_version.gni
+++ b/config/win/visual_studio_version.gni
@@ -40,7 +40,7 @@ if (visual_studio_path == "") {
          "You must set the windows_sdk_version if you set the path")
   assert(wdk_path != "",
          "You must set the wdk_path if you set the visual studio path")
-  visual_studio_runtime_dirs = []
+  visual_studio_runtime_dirs = "None"
 }
 
 visual_studio_version_logs = [ "windows_sdk_version=${windows_sdk_version}" ]