diff --git a/HACKING.md b/HACKING.md
index 9640cc93758..a77644f49ed 100644
--- a/HACKING.md
+++ b/HACKING.md
@@ -6,6 +6,9 @@ Building
 
 * Follow the setup & build instructions for [Mojo](https://github.com/domokit/mojo)
 
+If building for Android, be aware a patch to V8's GN build is required:
+https://code.google.com/p/v8/issues/detail?id=3841
+
 Running applications
 --------------------