diff --git a/Xbim.Ifc/Extensions/IfcStoreGeometryExtensions.cs b/Xbim.Ifc/Extensions/IfcStoreGeometryExtensions.cs
index ec4f98ae6..fcc8b2e5d 100644
--- a/Xbim.Ifc/Extensions/IfcStoreGeometryExtensions.cs
+++ b/Xbim.Ifc/Extensions/IfcStoreGeometryExtensions.cs
@@ -67,6 +67,7 @@ public static void SaveAsWexBim(this IModel model, BinaryWriter binaryStream, IE
                 {
                     binaryStream.Write((Int32)(r.Population));
                     var bounds = r.ToXbimRect3D();
+                    bounds = XbimRect3D.TransformBy(bounds, t);
                     var centre = t.Transform(r.Centre);
                     //write out the centre of the region
                     binaryStream.Write((Single)centre.X);