diff --git a/OpenRA.Mods.Common/Widgets/ScrollPanelWidget.cs b/OpenRA.Mods.Common/Widgets/ScrollPanelWidget.cs
index d8fa071721..4f77a0fa70 100644
--- a/OpenRA.Mods.Common/Widgets/ScrollPanelWidget.cs
+++ b/OpenRA.Mods.Common/Widgets/ScrollPanelWidget.cs
@@ -379,6 +379,9 @@ namespace OpenRA.Mods.Common.Widgets
 
 		void BindingAddImpl(object item)
 		{
+			if (makeWidget == null)
+				return;
+
 			var widget = makeWidget(item);
 			var scrollToBottom = autoScroll && ScrolledToBottom;