diff --git a/sratom.spec b/sratom.spec
index b3f4f36..0878218 100644
--- a/sratom.spec
+++ b/sratom.spec
@@ -9,6 +9,8 @@ Summary:    A C library for serializing LV2 plugins
 License:    MIT
 URL:        http://drobilla.net/software/%{name}/
 Source0:    http://download.drobilla.net/%{name}-%{version}.tar.bz2
+
+# Patch sent upstream https://github.com/lv2/sratom/pull/4
 Patch0:     %{name}-doc-install-directory.patch
 
 BuildRequires:  python3