diff --git a/Android.bp b/Android.bp
index c6f65be46..42a91944b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -149,6 +149,9 @@ cc_library_static {
     ],
 }
 
+// Not available to vendor modules until libc++ is updated and this library is
+// merged into libc++ proper.
+// https://issuetracker.google.com/147469372
 cc_library_static {
     name: "libc++fs",
     recovery_available: true,