diff --git a/Source/driver/parse_castro_params.py b/Source/driver/parse_castro_params.py
index 1467068e61..89f91a8ea7 100755
--- a/Source/driver/parse_castro_params.py
+++ b/Source/driver/parse_castro_params.py
@@ -270,7 +270,6 @@ def write_headers_and_source(params, out_directory, struct_name):
         print("namespace = ", nm)
         for ifdef in ifdefs:
             params_if = [q for q in params_nm if q.ifdef == ifdef]
-            types = set(q.dtype for q in params_if)
             types = sorted(set(q.dtype for q in params_if))
 
             if ifdef is None: