diff --git a/projecteuler/base.rs b/projecteuler/base.rs
index a949bc5..81890e5 100644
--- a/projecteuler/base.rs
+++ b/projecteuler/base.rs
@@ -4,5 +4,5 @@ fn main() {
     println!("Hello, this is Patrick!");
     let now = Instant::now();
 
-    println!("Time passed: {:?}", now);
+    println!("Time passed: {:?}", Instant::now() - now);
 }