diff --git a/src/gnu/io/RXTXCommDriver.java b/src/gnu/io/RXTXCommDriver.java
index 3dce198..954b102 100644
--- a/src/gnu/io/RXTXCommDriver.java
+++ b/src/gnu/io/RXTXCommDriver.java
@@ -576,6 +576,7 @@ public class RXTXCommDriver implements CommDriver
 						String[] Temp = {
 						"ttyS", // linux Serial Ports
 						"ttySA", // for the IPAQs
+						"ttyPZ", // for G4/G5 RackMac
 						"ttyUSB", // for USB frobs
 						"rfcomm",       // bluetooth serial device
 						"ttyircomm", // linux IrCommdevices (IrDA serial emu)
@@ -608,6 +609,7 @@ public class RXTXCommDriver implements CommDriver
 							// linux ISI serial card
 						"ttyMX",// linux Moxa Smart IO cards
 						"ttyP", // linux Hayes ESP serial card
+						"ttyPZ", // linux PPC/PPC64 Zilog serial ports
 						"ttyR", // linux comtrol cards
 							// linux Specialix RIO serial card
 						"ttyS", // linux Serial Ports