diff --git a/Source/Plugins/BuilderModes/ErrorChecks/CheckPolyobjects.cs b/Source/Plugins/BuilderModes/ErrorChecks/CheckPolyobjects.cs
index b2d0a15..5551dd7 100644
--- a/Source/Plugins/BuilderModes/ErrorChecks/CheckPolyobjects.cs
+++ b/Source/Plugins/BuilderModes/ErrorChecks/CheckPolyobjects.cs
@@ -80,7 +80,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			// Collect Things...
 			foreach(Thing t in General.Map.Map.Things)
 			{
-				ThingTypeInfo info = General.Map.Data.GetThingInfoEx(t.Type);
+				ThingTypeInfo info = General.Map.Data.GetThingInfoEx(t.SRB2Type);
 				if(info == null) continue;
 				switch(info.ClassName.ToLowerInvariant())
 				{