diff --git a/src/ifcwrap/IfcPython.i b/src/ifcwrap/IfcPython.i
index 8020ecf882..cbf95af0a9 100644
--- a/src/ifcwrap/IfcPython.i
+++ b/src/ifcwrap/IfcPython.i
@@ -148,6 +148,7 @@
 %ignore CircleSegments;
 %ignore CgalSmoothAngleDegrees;
 %ignore KeepBoundingBoxes;
+%ignore BboxSubstitutionThreshold;
 %ignore SurfaceColour;
 %ignore ComputeCurvature;
 %ignore FunctionStepType;