diff --git a/src/pages/adt/structural-corecursion.md b/src/pages/adt/structural-corecursion.md
index bcea5762..b7b47d62 100644
--- a/src/pages/adt/structural-corecursion.md
+++ b/src/pages/adt/structural-corecursion.md
@@ -336,7 +336,7 @@ counter = 0
 MyList.fill(5)(getAndInc())
 ```
 
-#### Exercise {-}
+#### Exercise: Iterate {-}
 
 Implement `iterate` using the same reasoning as we did for `fill`.
 This is slightly more complex than `fill` as we need to keep to bits of information: the value of the counter and the current value of type `A`.
@@ -368,6 +368,9 @@ MyList.iterate(0, 5)(x => x - 1)
 ```
 </div>
 
+
+#### Exercise: Map {-}
+
 Once you've completed `iterate`, try to implement `map` in terms of `unfold`.
 
 <div class="solution">