diff --git a/OpenRA.Mods.Common/Traits/BodyOrientation.cs b/OpenRA.Mods.Common/Traits/BodyOrientation.cs
index 86c1339a35..c15462f434 100644
--- a/OpenRA.Mods.Common/Traits/BodyOrientation.cs
+++ b/OpenRA.Mods.Common/Traits/BodyOrientation.cs
@@ -76,9 +76,14 @@ namespace OpenRA.Mods.Common.Traits
 				var isb = self.HasTrait<ISpriteBody>();
 
 				// If a sprite actor has neither custom QuantizedFacings nor a trait implementing IQuantizeBodyOrientationInfo, throw
-				if (qboi == null && isb)
-					throw new InvalidOperationException("Actor" + self.Info.Name + "has a sprite body but no facing quantization."
-						+ " Either add the QuantizeFacingsFromSequence trait or set custom QuantizedFacings on BodyOrientation.");
+				if (qboi == null)
+				{
+					if (isb)
+						throw new InvalidOperationException("Actor" + self.Info.Name + "has a sprite body but no facing quantization."
+							+ " Either add the QuantizeFacingsFromSequence trait or set custom QuantizedFacings on BodyOrientation.");
+					else
+						throw new InvalidOperationException("Actor type '" + self.Info.Name + "' does not define a quantized body orientation.");
+				}
 
 				return qboi.QuantizedBodyFacings(self.Info, self.World.Map.SequenceProvider, faction);
 			});