diff --git a/README.md b/README.md
index 768c6e0eddd3b38b113ccde51c1e8dc1de586a1d..01209c5369d50ec8b3f35d332454917980fc59f6 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ Locapack is distributed under the GPLv3 license. Please refer to the `LICENSE` f
 
 The `sequence_number` field is mandatory.
 
-The `timestamp` field is optional and its presence is announced in the header. The timestamp field contains the number of milliseconds since the boot of the local system. 
+The `timestamp` field is optional and its presence is announced in the header. The timestamp field contains the number of milliseconds since the boot of the local system. There is no synchronisation between different nodes. 
 
 The `movement_id` field is optional and its presence is announced in the header.