diff --git a/OpenRA.Mods.Common/Traits/Production.cs b/OpenRA.Mods.Common/Traits/Production.cs
index 89a5cc3ab4..99b340b268 100644
--- a/OpenRA.Mods.Common/Traits/Production.cs
+++ b/OpenRA.Mods.Common/Traits/Production.cs
@@ -32,7 +32,7 @@ namespace OpenRA.Mods.Common.Traits
 	{
 		readonly Lazy<RallyPoint> rp;
 
-		public ProductionInfo Info;
+		public readonly ProductionInfo Info;
 		public string Faction { get; private set; }
 
 		readonly bool occupiesSpace;