diff --git a/include/libremidi/backends/coremidi/helpers.hpp b/include/libremidi/backends/coremidi/helpers.hpp
index 08e62ff..ba35ec7 100644
--- a/include/libremidi/backends/coremidi/helpers.hpp
+++ b/include/libremidi/backends/coremidi/helpers.hpp
@@ -207,7 +207,8 @@ inline CFStringRef ConnectedEndpointName(MIDIEndpointRef endpoint)
 inline MIDIObjectRef
 locate_object(auto& self, const port_information& info, MIDIObjectType requested_type)
 {
-  auto uid = std::bit_cast<std::int32_t>((uint32_t)info.port);
+  std::int32_t uid;
+  std::memcpy(&uid, &(info.port), sizeof(uint32_t));
   MIDIObjectRef object{};
   MIDIObjectType type{};
   auto ret = MIDIObjectFindByUniqueID(uid, &object, &type);
diff --git a/include/libremidi/backends/coremidi/observer.hpp b/include/libremidi/backends/coremidi/observer.hpp
index defe623..12a936a 100644
--- a/include/libremidi/backends/coremidi/observer.hpp
+++ b/include/libremidi/backends/coremidi/observer.hpp
@@ -78,13 +78,16 @@ public:
     if (!ok)
       return {};

-    return std::conditional_t<Input, input_port, output_port>{
-        {.client = (std::uintptr_t)this->client,
-         .port = std::bit_cast<uint32_t>(get_int_property(obj, kMIDIPropertyUniqueID)),
-         .manufacturer = get_string_property(obj, kMIDIPropertyManufacturer),
-         .device_name = get_string_property(obj, kMIDIPropertyModel),
-         .port_name = get_string_property(obj, kMIDIPropertyName),
-         .display_name = get_string_property(obj, kMIDIPropertyDisplayName)}};
+    std::conditional_t<Input, input_port, output_port> ret{
+      {.client = (std::uintptr_t)this->client,
+        .port = 0,
+        .manufacturer = get_string_property(obj, kMIDIPropertyManufacturer),
+        .device_name = get_string_property(obj, kMIDIPropertyModel),
+        .port_name = get_string_property(obj, kMIDIPropertyName),
+        .display_name = get_string_property(obj, kMIDIPropertyDisplayName)}};
+    auto prop = get_int_property(obj, kMIDIPropertyUniqueID);
+    std::memcpy(&ret.port, &(prop), sizeof(prop));
+    return ret;
   }

   std::vector<libremidi::input_port> get_input_ports() const noexcept override