diff --git a/src/komposegl/README b/src/komposegl/README
new file mode 100644
index 0000000..247ee9e
--- /dev/null
+++ b/src/komposegl/README
@@ -0,0 +1,5 @@
+Code in this directory is currently unused by Komposé and
+it is unclear why exactly it is in the source tree, as it
+has never (to my knowledge) been used before.
+
+                                    -- 2021/04/01 blu.256