diff --git a/src/Mod/Arch/importIFCHelper.py b/src/Mod/Arch/importIFCHelper.py
index 34838c173722..a07f6324e2c2 100644
--- a/src/Mod/Arch/importIFCHelper.py
+++ b/src/Mod/Arch/importIFCHelper.py
@@ -641,7 +641,7 @@ def getCurveSet(ent):
         for el in elts:
             if el.is_a("IfcPolyline"):
                 result.append(getPolyline(el))
-            if el.is_a("IfcRectangleProfileDef"):
+            elif el.is_a("IfcRectangleProfileDef"):
                 result.append(getRectangle(el))
             elif el.is_a("IfcLine"):
                 result.append(getLine(el))