diff --git a/IFC4x3/Sections/Resource definition data schemas/Schemas/IfcGeometricModelResource/Entities/IfcPolygonalBoundedHalfSpace/DocEntity.xml b/IFC4x3/Sections/Resource definition data schemas/Schemas/IfcGeometricModelResource/Entities/IfcPolygonalBoundedHalfSpace/DocEntity.xml
index d0d45a933..da4587547 100644
--- a/IFC4x3/Sections/Resource definition data schemas/Schemas/IfcGeometricModelResource/Entities/IfcPolygonalBoundedHalfSpace/DocEntity.xml
+++ b/IFC4x3/Sections/Resource definition data schemas/Schemas/IfcGeometricModelResource/Entities/IfcPolygonalBoundedHalfSpace/DocEntity.xml
@@ -20,10 +20,11 @@
PolygonalBoundary.Dim = 2
- Only bounded curves of type _IfcCompositeCurve_, or _IfcPolyline_ are valid boundaries.
+ Only bounded curves of type _IfcCompositeCurve_, _IfcPolyline_, and _IfcIndexedPolyCurve_ are valid boundary curves.
SIZEOF(TYPEOF(PolygonalBoundary) * [
'IFCGEOMETRYRESOURCE.IFCPOLYLINE',
- 'IFCGEOMETRYRESOURCE.IFCCOMPOSITECURVE']
+ 'IFCGEOMETRYRESOURCE.IFCCOMPOSITECURVE',
+ 'IFCGEOMETRYRESOURCE.IFCINDEXEDPOLYCURVE']
) = 1