diff --git a/docs/api/structures/serial-port.md b/docs/api/structures/serial-port.md
index 052b961141..21d607c882 100644
--- a/docs/api/structures/serial-port.md
+++ b/docs/api/structures/serial-port.md
@@ -2,9 +2,9 @@
 
 * `portId` string - Unique identifier for the port.
 * `portName` string - Name of the port.
-* `displayName` string - A string suitable for display to the user for describing this device.
-* `vendorId` string - Optional USB vendor ID.
-* `productId` string - Optional USB product ID.
-* `serialNumber` string - The USB device serial number.
-* `usbDriverName` string (optional) - Represents a single serial port on macOS can be enumerated by multiple drivers.
-* `deviceInstanceId` string (optional) - A stable identifier on Windows that can be used for device permissions.
+* `displayName` string (optional) - A string suitable for display to the user for describing this device.
+* `vendorId` string (optional) - The USB vendor ID.
+* `productId` string (optional) - The USB product ID.
+* `serialNumber` string (optional) - The USB device serial number.
+* `usbDriverName` string (optional) _macOS_ - Represents a single serial port on macOS can be enumerated by multiple drivers.
+* `deviceInstanceId` string (optional) _Windows_ - A stable identifier on Windows that can be used for device permissions.