diff --git a/src/ansys/fluent/core/solver/flobject.py b/src/ansys/fluent/core/solver/flobject.py
index 8939939d64e..674339f3251 100644
--- a/src/ansys/fluent/core/solver/flobject.py
+++ b/src/ansys/fluent/core/solver/flobject.py
@@ -1750,13 +1750,13 @@ def __call__(self, *args, **kwds):
             raise KeyboardInterrupt
 
 
-# TODO: Remove this after paremater list() method is fixed from Fluent side
+# TODO: Remove this after parameter list() method is fixed from Fluent side
 def _fix_parameter_list_return(val):
     if isinstance(val, dict):
         new_val = {}
         for name, v in val.items():
             value, units = v
-            if len(units) > 0:
+            if len(units) > 0 and isinstance(units[0], str):
                 unit_labels = _fix_parameter_list_return.scheme_eval(
                     f"(units/inquire-available-label-strings-for-quantity '{units[0]})"
                 )
diff --git a/tests/parametric/test_parametric_workflow.py b/tests/parametric/test_parametric_workflow.py
index f582852b96c..db1ae10fef3 100644
--- a/tests/parametric/test_parametric_workflow.py
+++ b/tests/parametric/test_parametric_workflow.py
@@ -255,6 +255,15 @@ def test_parameters_list_function(static_mixer_settings_session):
     create_output_param("report-definition", "outlet-temp-avg")
     create_output_param("report-definition", "outlet-vel-avg")
 
+    # Create a unitless output parameter
+    unitless_quantity = solver.settings.solution.report_definitions.surface.create(
+        "temp-outlet-uniformity"
+    )
+    unitless_quantity.report_type = "surface-masswtui"
+    unitless_quantity.field = "temperature"
+    unitless_quantity.surface_names = ["outlet"]
+    unitless_quantity.output_parameter = True
+
     input_parameters_list = solver.parameters.input_parameters.list()
     output_parameters_list = solver.parameters.output_parameters.list()
     assert input_parameters_list == {
@@ -266,4 +275,5 @@ def test_parameters_list_function(static_mixer_settings_session):
     assert output_parameters_list == {
         "outlet-temp-avg-op": [0.0, "K"],
         "outlet-vel-avg-op": [0.0, "m/s"],
+        "temp-outlet-uniformity-op": [0.0, ""],
     }