diff --git a/09-Considering_Correctness.md b/09-Considering_Correctness.md
index a9b9c8b..5bc8b61 100644
--- a/09-Considering_Correctness.md
+++ b/09-Considering_Correctness.md
@@ -21,10 +21,10 @@ Consider using a typesafe library like
 
  * https://foonathan.net/type_safe/
  * https://github.com/rollbear/strong_type
+ * https://github.com/joboccara/NamedType
 
 Note that stronger typing can also allow for more compiler optimizations.
 
-
 * [Sorting in C vs C++](Sorting in C vs C++.pdf)