diff --git a/content/server-server-api.md b/content/server-server-api.md
index e87e8085..c72dee52 100644
--- a/content/server-server-api.md
+++ b/content/server-server-api.md
@@ -550,7 +550,7 @@ then any new event `D'` will not reference `C`:
     / \
     B   C
     |
-    D
+    D'
 
 #### Retrieving event authorization information