diff --git a/docs/docs/reference/new-types/union-types-spec.md b/docs/docs/reference/new-types/union-types-spec.md
index 75b884121338..3c07309d3179 100644
--- a/docs/docs/reference/new-types/union-types-spec.md
+++ b/docs/docs/reference/new-types/union-types-spec.md
@@ -71,6 +71,7 @@ Given
 ```scala
 trait C[+T]
 trait D
+trait E
 class A extends C[A] with D
 class B extends C[B] with D with E
 ```