diff --git a/Facepunch.Steamworks/Structs/Lobby.cs b/Facepunch.Steamworks/Structs/Lobby.cs
index 70ecdf3..b944499 100644
--- a/Facepunch.Steamworks/Structs/Lobby.cs
+++ b/Facepunch.Steamworks/Structs/Lobby.cs
@@ -133,7 +133,8 @@ namespace Steamworks.Data
 		/// </summary>
 		public bool SendChatString( string message )
 		{
-			var data = System.Text.Encoding.UTF8.GetBytes( message );
+			//adding null terminator as it's used in Helpers.MemoryToString
+			var data = System.Text.Encoding.UTF8.GetBytes( message + '\0' );
 			return SendChatBytes( data );
 		}