diff --git a/scripts/setup_working_directory.py b/scripts/setup_working_directory.py
index 9ac719ccd..f480d0283 100755
--- a/scripts/setup_working_directory.py
+++ b/scripts/setup_working_directory.py
@@ -155,7 +155,8 @@ def mkdir_p(path):
     "output_nc_eq",
     "output_nc_sp",
     "output_nc_tr",
-    "output_nc_sc"
+    "output_nc_sc",
+    "output_interval",
   ] 
 
   # Sort the keys in the IO section.