diff --git a/include/feeds.mk b/include/feeds.mk
index f484a4e92b..cb3e71ae3b 100644
--- a/include/feeds.mk
+++ b/include/feeds.mk
@@ -48,6 +48,8 @@ endef
 # 1: destination file
 define FeedSourcesAppendAPK
 ( \
+  echo '# This file is auto-generated and build-specific, any changes will be intentionally lost in sysupgrade.'; \
+  echo '# Add your custom feeds to /etc/apk/repositories.d/customfeeds.list'; \
   echo '%U/targets/%S/packages/packages.adb'; \
   $(strip $(if $(CONFIG_PER_FEED_REPO), \
 	echo '%U/packages/%A/base/packages.adb'; \