diff --git a/project_euler/problem_009/sol1.py b/project_euler/problem_009/sol1.py
index a58ea943e48b..4509d75bc670 100644
--- a/project_euler/problem_009/sol1.py
+++ b/project_euler/problem_009/sol1.py
@@ -38,6 +38,8 @@ def solution() -> int:
                         if (a + b + c) == 1000:
                             return a * b * c
 
+    return -1
+
 
 def solution_fast() -> int:
     """
@@ -58,6 +60,8 @@ def solution_fast() -> int:
             if a < b < c and (a ** 2) + (b ** 2) == (c ** 2):
                 return a * b * c
 
+    return -1
+
 
 def benchmark() -> None:
     """