diff --git a/doc/Guides/Sync/SyncVarHook.md b/doc/Guides/Sync/SyncVarHook.md
index 91f2fc7d9..48ac53052 100644
--- a/doc/Guides/Sync/SyncVarHook.md
+++ b/doc/Guides/Sync/SyncVarHook.md
@@ -8,6 +8,8 @@ The hook attribute can be used to specify a function to be called when the SyncV
 
 Below is a simple example of assigning a random color to each player when they're spawned on the server.  All clients will see all players in the correct colors, even if they join later.
 
+>   Note:  The signature for hook methods was changed in version 7.0 (Feb 2020) to having 2 parameters (old and new values).  If you're on an older version, hook methods just have one parameter (new value).
+
 ```cs
 using UnityEngine;
 using UnityEngine.Networking;