diff --git a/docs/reference/slate/text.md b/docs/reference/slate/text.md
index 8e3533760..6ca2805f0 100644
--- a/docs/reference/slate/text.md
+++ b/docs/reference/slate/text.md
@@ -30,7 +30,7 @@ The text contents of this node.
 
 ### `marks`
 
-`Immutable.List<Mark>,`
+`Immutable.Set<Mark>,`
 
 A list of marks for this node.