diff --git a/PythonicGcodeMachine/PythonLexYacc/README.md b/PythonicGcodeMachine/PythonLexYacc/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..498edcef504e13b0e8bca51e22deeb828af0fe70
--- /dev/null
+++ b/PythonicGcodeMachine/PythonLexYacc/README.md
@@ -0,0 +1 @@
+This directory contains PLY code, should be removed in future.