diff --git a/src/ansys/edb/core/inner/messages.py b/src/ansys/edb/core/inner/messages.py
index 596fe89330..0857e8028e 100644
--- a/src/ansys/edb/core/inner/messages.py
+++ b/src/ansys/edb/core/inner/messages.py
@@ -51,6 +51,7 @@
     StringsMessage,
     StringsPropertyMessage,
     TemperatureSettingsMessage,
+    UInt64PropertyMessage,
     ValueMessage,
     ValuePairMessage,
     ValuePairPropertyMessage,
@@ -369,6 +370,11 @@ def int_property_message(target, value):
     return IntPropertyMessage(target=target.msg, value=value)
 
 
+def uint64_property_message(target, value):
+    """Convert to a ``UInt64PropertyMessage`` object."""
+    return UInt64PropertyMessage(target=target.msg, value=value)
+
+
 def bool_property_message(target, value):
     """Convert to a ``BoolPropertyMessage`` object."""
     return BoolPropertyMessage(target=target.msg, value=value)
diff --git a/src/ansys/edb/core/simulation_setup/simulation_settings.py b/src/ansys/edb/core/simulation_setup/simulation_settings.py
index 1399dfea2d..3fee130b6b 100644
--- a/src/ansys/edb/core/simulation_setup/simulation_settings.py
+++ b/src/ansys/edb/core/simulation_setup/simulation_settings.py
@@ -199,7 +199,7 @@ def num_via_sides(self):
 
     @num_via_sides.setter
     def num_via_sides(self, num_via_sides):
-        self.__stub.SetNumViaSides(messages.int_property_message(self, num_via_sides))
+        self.__stub.SetNumViaSides(messages.uint64_property_message(self, num_via_sides))
 
     @property
     def num_via_density(self):