diff --git a/src/index.lagda.md b/src/index.lagda.md
index aa53dbd..c39b722 100644
--- a/src/index.lagda.md
+++ b/src/index.lagda.md
@@ -80,9 +80,10 @@ open import Monad.Instance.K.Commutative
 open import Monad.Instance.K.EquationalLifting
 ```
 
-and lastly we formalize the notion of *pre-Elgot monad* and show that **K** is the initial pre-Elgot monad.
+and lastly we formalize the notion of *pre-Elgot monad* and show that **K** is the initial (strong) pre-Elgot monad.
 
 ```agda
 open import Monad.PreElgot
 open import Monad.Instance.K.PreElgot
+open import Monad.Instance.K.StrongPreElgot
 ```
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