diff --git a/OpenRA.Mods.RA/Sellable.cs b/OpenRA.Mods.RA/Sellable.cs
index 399fd7f8a6..b4f014e1fe 100644
--- a/OpenRA.Mods.RA/Sellable.cs
+++ b/OpenRA.Mods.RA/Sellable.cs
@@ -9,6 +9,7 @@
 #endregion
 
 using OpenRA.Mods.RA.Activities;
+using OpenRA.Mods.RA.Buildings;
 using OpenRA.Mods.RA.Render;
 using OpenRA.Traits;
 
@@ -31,6 +32,9 @@ namespace OpenRA.Mods.RA
 				if (capturing != null && capturing.CaptureInProgress)
 					return;
 
+				if (!self.Trait<Building>().Lock())
+					return;
+
 				Selling = true;
 
 				foreach( var ns in self.TraitsImplementing<INotifySold>() )