diff --git a/Nasal/IOrules b/Nasal/IOrules
index a67bcf3da..71d2f677f 100644
--- a/Nasal/IOrules
+++ b/Nasal/IOrules
@@ -33,6 +33,7 @@ READ ALLOW $FG_SCENERY/*
 WRITE ALLOW /tmp/*.xml
 WRITE ALLOW $FG_HOME/*.sav
 WRITE ALLOW $FG_HOME/*.log
+WRITE ALLOW $FG_HOME/cache/*
 WRITE ALLOW $FG_HOME/Export/*
 WRITE ALLOW $FG_HOME/state/*.xml
 WRITE ALLOW $FG_HOME/aircraft-data/*.xml