diff --git a/Barotrauma/BarotraumaClient/Source/Screens/NetLobbyScreen.cs b/Barotrauma/BarotraumaClient/Source/Screens/NetLobbyScreen.cs
index 79582a0e9..c75161cb0 100644
--- a/Barotrauma/BarotraumaClient/Source/Screens/NetLobbyScreen.cs
+++ b/Barotrauma/BarotraumaClient/Source/Screens/NetLobbyScreen.cs
@@ -1532,7 +1532,7 @@ namespace Barotrauma
                 requestFileBox.Buttons[0].OnClicked += (GUIButton button, object userdata) =>
                 {
                     string[] fileInfo = (string[])userdata;
-                    GameMain.Client.RequestFile(FileTransferType.Submarine, fileInfo[0], fileInfo[1]);
+                    GameMain.Client?.RequestFile(FileTransferType.Submarine, fileInfo[0], fileInfo[1]);
                     return true;
                 };
                 requestFileBox.Buttons[1].OnClicked += requestFileBox.Close;