diff --git a/Dockerfile b/Dockerfile
index 830d351..5c7632b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,6 +2,7 @@ FROM binhex/arch-int-vpn:latest
 LABEL org.opencontainers.image.authors = "binhex"
 LABEL org.opencontainers.image.source = "https://github.com/binhex/arch-qbittorrentvpn"
 
+# Architecture from buildx --platform, e.g. arm64
 ARG TARGETARCH
 
 # additional files