diff --git a/serial/serial.go b/serial/serial.go
index 7a1f470..913fe9b 100644
--- a/serial/serial.go
+++ b/serial/serial.go
@@ -21,10 +21,11 @@ type SerialPortError struct {
 
 const (
 	ERROR_PORT_BUSY           = 1
-	ERROR_NOT_FOUND           = 2
+	ERROR_PORT_NOT_FOUND      = 2
 	ERROR_INVALID_SERIAL_PORT = 3
 	ERROR_PERMISSION_DENIED   = 4
 	ERROR_INVALID_PORT_SPEED  = 5
+	ERROR_ENUMERATING_PORTS   = 6
 	ERROR_OTHER               = 99
 )
 
@@ -32,7 +33,7 @@ func (e SerialPortError) Error() string {
 	switch e.code {
 	case ERROR_PORT_BUSY:
 		return "Serial port busy"
-	case ERROR_NOT_FOUND:
+	case ERROR_PORT_NOT_FOUND:
 		return "Serial port not found"
 	case ERROR_INVALID_SERIAL_PORT:
 		return "Invalid serial port"
@@ -40,6 +41,8 @@ func (e SerialPortError) Error() string {
 		return "Permission denied"
 	case ERROR_INVALID_PORT_SPEED:
 		return "Invalid port speed"
+	case ERROR_ENUMERATING_PORTS:
+		return "Could not enumerate serial ports"
 	}
 	return e.err
 }