diff --git a/guard2once.txt b/guard2once.txt
new file mode 100644
index 00000000..b8476a5c
--- /dev/null
+++ b/guard2once.txt
@@ -0,0 +1,10 @@
+Install
+python -m pip install guardonce
+
+Navigate to etl/include/etl
+
+Change from #include guard to #pragma once
+guard2once -r "."
+
+Change from #pragma once to #include guard
+once2guard -r -p "path | snake | prepend ETL | upper" .
\ No newline at end of file