Index: ps/trunk/binaries/data/mods/public/gui/session/trade/BarterButton.js
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/session/trade/BarterButton.js
+++ ps/trunk/binaries/data/mods/public/gui/session/trade/BarterButton.js
@@ -49,6 +49,13 @@
 	 */
 	update(viewedPlayer)
 	{
+		if (viewedPlayer < 1)
+		{
+			this.buyButton.hidden = true;
+			this.sellButton.hidden = true;
+			return;
+		}
+
 		this.amountToSell = this.BarterResourceSellQuantity;
 
 		if (Engine.HotkeyIsPressed("session.massbarter"))
Index: ps/trunk/binaries/data/mods/public/gui/session/trade/BarterButtonManager.js
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/session/trade/BarterButtonManager.js
+++ ps/trunk/binaries/data/mods/public/gui/session/trade/BarterButtonManager.js
@@ -34,16 +34,15 @@
 
 	getSelectedButton()
 	{
-		for (let button of this.buttons)
+		for (const button of this.buttons)
 			if (!this.selectedResource || this.selectedResource == button.resourceCode)
 				return button;
 	}
 
 	update()
 	{
-		if (this.viewedPlayer >= 1)
-			for (let button of this.buttons)
-				button.update(this.viewedPlayer);
+		for (const button of this.buttons)
+			button.update(this.viewedPlayer);
 	}
 }