diff --git a/metadata/net.i2p.android.router.txt b/metadata/net.i2p.android.router.txt
index 371449e059..3a30b380a6 100644
--- a/metadata/net.i2p.android.router.txt
+++ b/metadata/net.i2p.android.router.txt
@@ -104,6 +104,8 @@ Build:0.9.11-0_b1-API8,4741120
 # RELEASE       8 bits 0-255
 # ROUTERBUILD   7 bits 0-127
 # ANDROIDBUILD  4 bits 0-15
+# see custom_rules.xml
+# increment build number, for updates between router releases.
 
 Auto Update Mode:None
 Update Check Mode:None