diff --git a/toolchain/mfc/bench.py b/toolchain/mfc/bench.py
index f2429e4c01..8843de3507 100644
--- a/toolchain/mfc/bench.py
+++ b/toolchain/mfc/bench.py
@@ -1,4 +1,4 @@
-import os, sys, uuid, subprocess, dataclasses
+import os, sys, uuid, subprocess, dataclasses, typing
 
 import rich.table
 
@@ -13,7 +13,7 @@
 class BenchCase:
     slug: str
     path: str
-    args: list[str]
+    args: typing.List[str]
 
 
 def bench(targets = None):