diff --git a/src/ezfio_files/EZFIO.cfg b/src/ezfio_files/EZFIO.cfg
new file mode 100644
index 00000000..a65cda1a
--- /dev/null
+++ b/src/ezfio_files/EZFIO.cfg
@@ -0,0 +1,9 @@
+[ezfio_convention]
+type: integer
+doc: Version of the EZFIO conventions
+interface: ezfio, provider, ocaml
+default: 20210101
+
+# EZFIO conventions
+# 20210101: Old conventions
+# 20250211: Changed normalization of AOs: Moved GAMESS convention from primitives to AOs for compatibility with trexio.