diff --git a/Dockerfile.arm64 b/Dockerfile.arm64
index 33b20793ed..6d7aa21183 100644
--- a/Dockerfile.arm64
+++ b/Dockerfile.arm64
@@ -1,3 +1,5 @@
+# Requires binfm_misc registration for aarch64
+# https://github.com/multiarch/qemu-user-static#binfmt_misc-register
 ARG DOTNET_VERSION=3.0