diff --git a/engine/Sandbox.Engine/Systems/Networking/System/NetworkSystem.Message.cs b/engine/Sandbox.Engine/Systems/Networking/System/NetworkSystem.Message.cs
index 71ac0d4a..5b47137a 100644
--- a/engine/Sandbox.Engine/Systems/Networking/System/NetworkSystem.Message.cs
+++ b/engine/Sandbox.Engine/Systems/Networking/System/NetworkSystem.Message.cs
@@ -292,7 +292,7 @@ internal partial class NetworkSystem
 			ByteStream bs = ByteStream.Create( 512 );
 			bs.Write( InternalMessageType.HeartbeatPong );
 			bs.Write( serverRealTime ); // the time they sent
-			source.SendStream( bs );
+			source.SendStream( bs, NetFlags.Unreliable | NetFlags.SendImmediate );
 			bs.Dispose();
 		}
 
diff --git a/engine/Sandbox.Engine/Systems/Networking/System/NetworkSystem.cs b/engine/Sandbox.Engine/Systems/Networking/System/NetworkSystem.cs
index 18f1696b..9877930c 100644
--- a/engine/Sandbox.Engine/Systems/Networking/System/NetworkSystem.cs
+++ b/engine/Sandbox.Engine/Systems/Networking/System/NetworkSystem.cs
@@ -361,7 +361,7 @@ internal partial class NetworkSystem
 			bs.Write( InternalMessageType.HeartbeatPing );
 			bs.Write( RealTime.Now ); // Real time
 			bs.Write( Time.NowDouble ); // Game time
-			c.SendStream( bs );
+			c.SendStream( bs, NetFlags.Unreliable | NetFlags.SendImmediate );
 			bs.Dispose();
 		}
 	}