diff --git a/scripts/phase0/function_puller.py b/scripts/phase0/function_puller.py
index 812498b2bd..59e5b5e24a 100644
--- a/scripts/phase0/function_puller.py
+++ b/scripts/phase0/function_puller.py
@@ -2,7 +2,7 @@
 from typing import List
 
 
-def get_spec(file_name) -> List[str]:
+def get_spec(file_name: str) -> List[str]:
     code_lines = []
     pulling_from = None
     current_name = None