diff --git a/project_euler/problem_008/sol2.py b/project_euler/problem_008/sol2.py
index 7f0540263278..889c3a3143c2 100644
--- a/project_euler/problem_008/sol2.py
+++ b/project_euler/problem_008/sol2.py
@@ -70,7 +70,9 @@ def solution(n: str = N) -> int:
     """
 
     return max(
-        reduce(lambda x, y: int(x) * int(y), n[i : i + 13]) for i in range(len(n) - 12)
+        # mypy cannot properly interpret reduce
+        int(reduce(lambda x, y: str(int(x) * int(y)), n[i : i + 13]))
+        for i in range(len(n) - 12)
     )