diff --git a/solutions/lifetime/lifetime.md b/solutions/lifetime/lifetime.md
index 68be366..bad1c2f 100644
--- a/solutions/lifetime/lifetime.md
+++ b/solutions/lifetime/lifetime.md
@@ -49,7 +49,7 @@ struct Example<'a, 'b> {
 }
 
 /* Fix function signature */
-fn fix_me<'b>(foo: &Example<'b>) -> &'b NoCopyType
+fn fix_me<'b>(foo: &Example<'_, 'b>) -> &'b NoCopyType
 { foo.b }
 
 fn main()