diff --git a/doc/identify-missing-copyright.txt b/doc/identify-missing-copyright.txt
new file mode 100644
index 0000000000..0c1d7c2caf
--- /dev/null
+++ b/doc/identify-missing-copyright.txt
@@ -0,0 +1,5 @@
+This regexp will identify all files not starting with the character '/'
+Useful to detect files with missing copyright header
+
+^(?!/).*$
+