diff --git a/binaries/data/mods/public/gui/session/message_box/QuitConfirmationMenu.js b/binaries/data/mods/public/gui/session/message_box/QuitConfirmationMenu.js
index b4dbe5d30c..9e095b5faf 100644
--- a/binaries/data/mods/public/gui/session/message_box/QuitConfirmationMenu.js
+++ b/binaries/data/mods/public/gui/session/message_box/QuitConfirmationMenu.js
@@ -74,9 +74,9 @@ QuitConfirmationMenu.prototype.MultiplayerClient.prototype.Buttons =
 		},
 		{
 			"caption": translate("Yes"),
-			"onPress": closeSession =>
+			"onPress": function()
 			{
-				(new ReturnQuestion()).display(closeSession);
+				(new ReturnQuestion()).display(this.closeSession);
 			}
 		}
 	];