diff --git a/src/IO.Ably.Shared/Extensions/PresenceExtensions.cs b/src/IO.Ably.Shared/Extensions/PresenceExtensions.cs
index f5f4f6b23..64c6f97dc 100644
--- a/src/IO.Ably.Shared/Extensions/PresenceExtensions.cs
+++ b/src/IO.Ably.Shared/Extensions/PresenceExtensions.cs
@@ -2,7 +2,7 @@
 {
     internal static class PresenceExtensions
     {
-        public static bool IsSynthesized(this PresenceMessage msg)
+        public static bool IsServerSynthesized(this PresenceMessage msg)
         {
             return msg.Id == null || !msg.Id.StartsWith(msg.ConnectionId);
         }
@@ -11,7 +11,7 @@ public static bool IsSynthesized(this PresenceMessage msg)
         public static bool IsNewerThan(this PresenceMessage existingMsg, PresenceMessage incomingMsg)
         {
             // RTP2b1
-            if (existingMsg.IsSynthesized() || incomingMsg.IsSynthesized())
+            if (existingMsg.IsServerSynthesized() || incomingMsg.IsServerSynthesized())
             {
                 return existingMsg.Timestamp > incomingMsg.Timestamp;
             }
diff --git a/src/IO.Ably.Shared/Realtime/Presence.cs b/src/IO.Ably.Shared/Realtime/Presence.cs
index 68784ae69..42358fd7c 100644
--- a/src/IO.Ably.Shared/Realtime/Presence.cs
+++ b/src/IO.Ably.Shared/Realtime/Presence.cs
@@ -596,7 +596,7 @@ internal void OnPresence(PresenceMessage[] messages)
                             // RTP2e
                             case PresenceAction.Leave:
                                 broadcast &= MembersMap.Remove(message);
-                                if (updateInternalPresence && !message.IsSynthesized())
+                                if (updateInternalPresence && !message.IsServerSynthesized())
                                 {
                                     InternalMembersMap.Remove(message);
                                 }
diff --git a/src/IO.Ably.Tests.Shared/Realtime/PresenceSandboxSpecs.cs b/src/IO.Ably.Tests.Shared/Realtime/PresenceSandboxSpecs.cs
index 2ba561ae9..c1926a260 100644
--- a/src/IO.Ably.Tests.Shared/Realtime/PresenceSandboxSpecs.cs
+++ b/src/IO.Ably.Tests.Shared/Realtime/PresenceSandboxSpecs.cs
@@ -636,7 +636,7 @@ await WaitForMultiple(2, partialDone =>
                 msgA = null;
                 msgB = null;
                 var synthesizedMsg = new PresenceMessage(PresenceAction.Leave, clientB.ClientId) { ConnectionId = null };
-                synthesizedMsg.IsSynthesized().Should().BeTrue();
+                synthesizedMsg.IsServerSynthesized().Should().BeTrue();
                 channelB.Presence.OnPresence(new[] { synthesizedMsg });
 
                 msgB.Should().BeNull();