diff --git a/documentation/design/05-implementation.md b/documentation/design/05-implementation.md
index 81ca09e186ab0af50fd4215545248abc1ac9a225..b5f63db91632895b9654a57cb2e6d1467a14953e 100644
--- a/documentation/design/05-implementation.md
+++ b/documentation/design/05-implementation.md
@@ -53,7 +53,7 @@ graph TB
   SubGraph1 --> SubGraph1Flow
   subgraph "G_logical1"
   SubGraph1Flow(SubNode 1)
-  Node1_l1[Node1_l1] <--> Node2_l1[Node2_l1] <--> Node3_l1[Node3_l1] <--> Node4_l1[Node4_l1] <--> Node5_l1[Node5_l1] <<-->> Node1_l1[Node1_l1]
+  Node1_l1[Node1_l1] <--> Node2_l1[Node2_l1] <--> Node3_l1[Node3_l1] <--> Node4_l1[Node4_l1] <--> Node5_l1[Node5_l1] <--> Node1_l1[Node1_l1]
   end
 
   subgraph "G_physical"