diff --git a/root.bp b/root.bp
index 219b4e503..f14b047cb 100644
--- a/root.bp
+++ b/root.bp
@@ -28,6 +28,7 @@ optional_subdirs = [
     "libcore",
     "libnativehelper",
     "packages/apps/HTMLViewer",
+    "prebuilts/clang/host/linux-x86",
     "prebuilts/ndk",
     "prebuilts/sdk",
     "system/*",