diff --git a/exercises/primitive_types/primitive_types6.rs b/exercises/primitive_types/primitive_types6.rs
index 0fa42b27..b8c9b82b 100644
--- a/exercises/primitive_types/primitive_types6.rs
+++ b/exercises/primitive_types/primitive_types6.rs
@@ -8,7 +8,7 @@
 #[test]
 fn indexing_tuple() {
     let numbers = (1, 2, 3);
-    /// Replace below ??? with the tuple indexing syntax.
+    // Replace below ??? with the tuple indexing syntax.
     let second = ???;
 
     assert_eq!(2, second,