diff --git a/modflow_devtools/dfn.py b/modflow_devtools/dfn.py
index 8e7c3408..0363f64d 100644
--- a/modflow_devtools/dfn.py
+++ b/modflow_devtools/dfn.py
@@ -513,7 +513,7 @@ def _rest():
             advanced=_advanced(),
             multi=_multi(),
             sln=_sln(),
-            sub=_sub(),
+            ref=_sub(),
             **blocks,
         )