diff --git a/changelogs/server_server/newsfragments/3340.clarification b/changelogs/server_server/newsfragments/3340.clarification
new file mode 100644
index 00000000..8128a223
--- /dev/null
+++ b/changelogs/server_server/newsfragments/3340.clarification
@@ -0,0 +1 @@
+Tweak the example PDU diagram to better demonstrate situations with multiple `prev_events`.
diff --git a/content/server-server-api.md b/content/server-server-api.md
index 763c0e68..9c6552ab 100644
--- a/content/server-server-api.md
+++ b/content/server-server-api.md
@@ -333,15 +333,16 @@ after all other known events.
 
 For example, consider a room whose events form the DAG shown below. A
 server creating a new event in this room should populate the new event's
-`prev_events` field with `E4` and `E5`, since neither event yet has a
-child:
+`prev_events` field with both `E4` and `E6`, since neither event yet has
+a child:
 
     E1
     ^
     |
-    +-> E2 <-+
-    |        |
-    E3       E5
+    E2 <--- E5
+    ^       ^
+    |       |
+    E3      E6
     ^
     |
     E4