diff --git a/Nasal/IOrules b/Nasal/IOrules
index ec8178cf4..96b2df665 100644
--- a/Nasal/IOrules
+++ b/Nasal/IOrules
@@ -29,4 +29,6 @@
 READ ALLOW $FG_ROOT/*
 READ ALLOW $FG_HOME/*
 
+WRITE ALLOW $FG_HOME/*.sav
 WRITE ALLOW $FG_HOME/Export/*
+WRITE ALLOW $FG_HOME/aircraft-data/*.xml