diff --git a/examples/aoc2024/day21/part2.jou b/examples/aoc2024/day21/part2.jou
index d2016960..21b05e1a 100644
--- a/examples/aoc2024/day21/part2.jou
+++ b/examples/aoc2024/day21/part2.jou
@@ -240,4 +240,6 @@ def main() -> int:
         result += numpad_cost(line, initial_level) * atoi(line)
 
     printf("%lld\n", result)  # Output: 126384
+
+    fclose(f)
     return 0