diff --git a/nullptr/missions/base.py b/nullptr/missions/base.py
index a502986..3f14477 100644
--- a/nullptr/missions/base.py
+++ b/nullptr/missions/base.py
@@ -26,7 +26,9 @@ class MissionParam:
     elif self.cls == int:
       return int(val)
     elif self.cls == list:
-      return [i.strip() for i in val.split(',')]
+      if type(val) == str:
+        return [i.strip() for i in val.split(',')]
+      return val
     elif issubclass(self.cls, Base):
       if type(val) == str:
         data = store.get(self.cls, val)