diff --git a/src/cpp/web-ifc/geometry/IfcGeometryLoader.cpp b/src/cpp/web-ifc/geometry/IfcGeometryLoader.cpp
index 1a84f23e7..0a1896772 100644
--- a/src/cpp/web-ifc/geometry/IfcGeometryLoader.cpp
+++ b/src/cpp/web-ifc/geometry/IfcGeometryLoader.cpp
@@ -3150,7 +3150,8 @@ namespace webifc::geometry
       _loader.MoveToArgumentOffset(expressID, 0);
       profile.type = _loader.GetStringArgument();
       _loader.MoveToArgumentOffset(expressID, 2);
-      profile.curve = GetCurve(_loader.GetRefArgument(), 2);
+      // ISSUE 1973 same as IFCARBITRARYCLOSEDPROFILEDEF: 3D curves require dimension 3
+      profile.curve = GetCurve(_loader.GetRefArgument(), 3);
       profile.isConvex = IsCurveConvex(profile.curve);
 
       _loader.MoveToArgumentOffset(expressID, 3);
@@ -3158,7 +3159,7 @@ namespace webifc::geometry
 
       for (auto &hole : holes)
       {
-        IfcCurve holeCurve = GetCurve(_loader.GetRefArgument(hole), 2);
+        IfcCurve holeCurve = GetCurve(_loader.GetRefArgument(hole), 3);
         profile.holes.push_back(holeCurve);
       }