diff --git a/OpenRA.Mods.Common/Traits/Buildings/Bib.cs b/OpenRA.Mods.Common/Traits/Buildings/Bib.cs
index 8e3f1fd112..86c3c0aeee 100644
--- a/OpenRA.Mods.Common/Traits/Buildings/Bib.cs
+++ b/OpenRA.Mods.Common/Traits/Buildings/Bib.cs
@@ -17,7 +17,7 @@ namespace OpenRA.Mods.Common.Traits
 {
 	public class BibInfo : ITraitInfo, Requires<BuildingInfo>, IRenderActorPreviewSpritesInfo, Requires<RenderSpritesInfo>
 	{
-		public readonly string Sequence = "bib";
+		[SequenceReference] public readonly string Sequence = "bib";
 		public readonly string Palette = "terrain";
 		public readonly bool HasMinibib = false;
 
diff --git a/OpenRA.Mods.Common/Traits/Buildings/RepairableBuilding.cs b/OpenRA.Mods.Common/Traits/Buildings/RepairableBuilding.cs
index 65f03178b6..0568746e4e 100644
--- a/OpenRA.Mods.Common/Traits/Buildings/RepairableBuilding.cs
+++ b/OpenRA.Mods.Common/Traits/Buildings/RepairableBuilding.cs
@@ -26,7 +26,7 @@ namespace OpenRA.Mods.Common.Traits
 		public readonly bool CancelWhenDisabled = false;
 
 		public readonly string IndicatorImage = "allyrepair";
-		public readonly string IndicatorSequence = "repair";
+		[SequenceReference("IndicatorImage")] public readonly string IndicatorSequence = "repair";
 
 		[Desc("Overrides the IndicatorPalettePrefix.")]
 		public readonly string IndicatorPalette = "";