diff --git a/src/ifcopenshell-python/ifcopenshell/util/selector.py b/src/ifcopenshell-python/ifcopenshell/util/selector.py
index fb98c7a87d..fd4b790350 100644
--- a/src/ifcopenshell-python/ifcopenshell/util/selector.py
+++ b/src/ifcopenshell-python/ifcopenshell/util/selector.py
@@ -189,7 +189,7 @@ class Selector:
                 value = None
         for element in elements:
             element_value = cls.get_element_value(element, key)
-            if element_value is None and value is not None:
+            if element_value is None and value is not None and "not" not in comparison:
                 continue
             if comparison and cls.filter_element(element, element_value, comparison, value):
                 results.append(element)
diff --git a/src/ifcopenshell-python/test/util/test_selector.py b/src/ifcopenshell-python/test/util/test_selector.py
index ccbf60b443..787b4b2b60 100644
--- a/src/ifcopenshell-python/test/util/test_selector.py
+++ b/src/ifcopenshell-python/test/util/test_selector.py
@@ -112,7 +112,7 @@ class TestSelector(test.bootstrap.IFC4):
         assert subject.Selector.parse(self.file, '.IfcElement[Name*="oba"]') == [element]
         assert subject.Selector.parse(self.file, '.IfcElement[Name*="abc"]') == []
 
-    def test_comparing_if_value_does_not_exist(self):
+    def test_selecting_if_value_not_matching(self):
         element_1 = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcWall")
         element_2 = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcWall")
         pset_1 = ifcopenshell.api.run("pset.add_pset", self.file, product=element_1, name="Foo_Bar")
@@ -122,6 +122,11 @@ class TestSelector(test.bootstrap.IFC4):
         assert subject.Selector.parse(self.file, '.IfcElement[Foo_Bar.Foo != "Bar"]') == [element_2]
         assert subject.Selector.parse(self.file, '.IfcElement[Foo_Bar.Foo != "BOO"]') == [element_1]
         
+
+    def test_selecting_when_attribute_is_none(self):
+        element = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcWall")
+        assert subject.Selector.parse(self.file, '.IfcElement[PredefinedType !="non-existent predefined type"]') == [element]
+        
     def test_selecting_a_property_which_includes_non_standard_characters(self):
         element = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcWall")
         pset = ifcopenshell.api.run("pset.add_pset", self.file, product=element, name="a !%$§&/()?|*-+,€~#@µ^°a")