diff --git a/paramecio/cromosoma/extraforms/fileform.py b/paramecio/cromosoma/extraforms/fileform.py
new file mode 100644
index 0000000..944886c
--- /dev/null
+++ b/paramecio/cromosoma/extraforms/fileform.py
@@ -0,0 +1,4 @@
+#!/usr/bin/python3
+
+from paramecio.cromosoma.coreforms import BaseForm
+