diff --git a/nodejs-undici.spec b/nodejs-undici.spec
index adc7e13..b37f838 100644
--- a/nodejs-undici.spec
+++ b/nodejs-undici.spec
@@ -18,6 +18,7 @@ Source2:    %{npm_name}-%{version}-nm-dev.tgz
 Source3:    %{npm_name}-%{version}-bundled-licenses.txt
 Source4:    %{npm_name}-sources.sh
 
+# Upstream proposal: https://github.com/nodejs/undici/pull/2403
 Patch:      0001-feat-allow-customization-of-build-environment.patch
 
 # Binary artifacts in this package are aimed at the wasm32-wasi "architecture".