diff --git a/docs/walkthroughs/01-installing-slate.md b/docs/walkthroughs/01-installing-slate.md
index 01a7abed9..9fb96f3c2 100644
--- a/docs/walkthroughs/01-installing-slate.md
+++ b/docs/walkthroughs/01-installing-slate.md
@@ -59,7 +59,7 @@ type CustomText = { text: string }
 
 declare module 'slate' {
   interface CustomTypes {
-    Editor: BaseEditor & ReactEditor & HistoryEditor
+    Editor: BaseEditor & ReactEditor
     Element: CustomElement
     Text: CustomText
   }