diff --git a/src_main/io_devices/piserial.h b/src_main/io_devices/piserial.h
index ec9b6035..e52fec2f 100755
--- a/src_main/io_devices/piserial.h
+++ b/src_main/io_devices/piserial.h
@@ -264,5 +264,10 @@ inline PICout operator <<(PICout s, const PISerial::DeviceInfo & v) {
 	return s;
 }
 
+inline bool operator ==(const PISerial::DeviceInfo & v0, const PISerial::DeviceInfo & v1) {return v0.path == v1.path;}
+inline bool operator !=(const PISerial::DeviceInfo & v0, const PISerial::DeviceInfo & v1) {return v0.path != v1.path;}
+inline PIByteArray & operator <<(PIByteArray & s, const PISerial::DeviceInfo & v) {s << v.vID << v.pID << v.path << v.description << v.manufacturer; return s;}
+inline PIByteArray & operator >>(PIByteArray & s,       PISerial::DeviceInfo & v) {s >> v.vID >> v.pID >> v.path >> v.description >> v.manufacturer; return s;}
+
 
 #endif // PISERIAL_H