diff --git a/src/ifcopenshell-python/ifcopenshell/api/pset/remove_pset.py b/src/ifcopenshell-python/ifcopenshell/api/pset/remove_pset.py
index 44aa512ab3..c17079dffc 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/pset/remove_pset.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/pset/remove_pset.py
@@ -69,7 +69,7 @@ class Usecase:
                     continue
                 if prop.is_a("IfcPropertyEnumeratedValue"):
                     enumeration = prop.EnumerationReference
-                    if self.file.get_total_inverses(enumeration) == 1:
+                    if enumeration and self.file.get_total_inverses(enumeration) == 1:
                         self.file.remove(enumeration)
                 self.file.remove(prop)
             self.file.remove(self.settings["pset"])