diff --git a/third_party/third_party.gni b/third_party/third_party.gni
index 3c1059a..e35c3ec 100644
--- a/third_party/third_party.gni
+++ b/third_party/third_party.gni
@@ -11,8 +11,15 @@
       if (defined(invoker.public_defines)) {
         defines = invoker.public_defines
       }
-      if (is_win) {
+      if (is_win && !is_clang) {
         include_dirs = invoker.public_include_dirs
+      } else if (is_win && is_clang) {
+        foreach(dir, invoker.public_include_dirs) {
+          cflags += [
+            "/imsvc",
+            rebase_path(dir),
+          ]
+        }
       } else {
         foreach(dir, invoker.public_include_dirs) {
           cflags += [