diff --git a/root.bp b/root.bp
index a1b1f6bf3..d1e8e3eb9 100644
--- a/root.bp
+++ b/root.bp
@@ -15,6 +15,7 @@ optional_subdirs = [
     "build/tools/*",
     "dalvik",
     "development/*",
+    "device/*/*",
     "external/*",
     "frameworks/av",
     "frameworks/base",