diff --git a/doc_resources/gateway/sequence_data_collection.puml b/doc_resources/gateway/sequence_data_collection.puml
index b4fdbb8..984c9c4 100644
--- a/doc_resources/gateway/sequence_data_collection.puml
+++ b/doc_resources/gateway/sequence_data_collection.puml
@@ -16,7 +16,7 @@ else company_id == 0xffff
 
     alt payload size != 12 bytes
         gw -> gw : discard packet\n(non-Thingy device)
-    else payload size == 12 bytes
+    else
         gw -> gw : decode_payload()
 
         alt unknown key in payload