diff --git a/app/modules/evaluation.py b/app/modules/evaluation.py
index 3e1cdb7..fefd358 100644
--- a/app/modules/evaluation.py
+++ b/app/modules/evaluation.py
@@ -232,7 +232,7 @@ class EvalModule(niobot.Module):
     @niobot.is_owner()
     async def runas(self, ctx: niobot.Context, user: str, command: str, *args):
         """Run a command as another user."""
-        if args is not None and args[0] == "%null%":
+        if args is not None and args[0] == "%null%" or args is None:
             args = tuple()
         event = ctx.event
         event.sender = user