diff --git a/dakota_interface.py b/dakota_interface.py
index 725e2e5..a9d608a 100644
--- a/dakota_interface.py
+++ b/dakota_interface.py
@@ -173,7 +173,11 @@ def substitute(
         params[label] = dv
     
     if not proc_func is None:
-        proc_func(params)
+        if type(proc_func).__name__ == 'list':
+            for pf in proc_func:
+                pf(params)
+        else:
+            proc_func(params)
     # print(params)