diff --git a/src/GmRelay.Shared/Features/Sessions/CreateSession/CreateSessionHandler.cs b/src/GmRelay.Shared/Features/Sessions/CreateSession/CreateSessionHandler.cs
index 5cb7c32..a8c551f 100644
--- a/src/GmRelay.Shared/Features/Sessions/CreateSession/CreateSessionHandler.cs
+++ b/src/GmRelay.Shared/Features/Sessions/CreateSession/CreateSessionHandler.cs
@@ -34,7 +34,7 @@ public sealed class CreateSessionHandler(
                 SET display_name = EXCLUDED.display_name,
                     external_username = EXCLUDED.external_username;
                 """,
-                new { ExternalId = externalUserId, Name = displayName, Username = externalUsername },
+                new { ExternalId = externalUserId, Name = displayName, Username = externalUsername, Platform = platform },
                 transaction);
 
             var existingGroup = await connection.QuerySingleOrDefaultAsync<SessionCreationGroupAccessDto>(