diff --git a/src/gnu/io/RXTXCommDriver.java b/src/gnu/io/RXTXCommDriver.java
index 3dce198..55bcf3c 100644
--- a/src/gnu/io/RXTXCommDriver.java
+++ b/src/gnu/io/RXTXCommDriver.java
@@ -577,6 +577,7 @@ public class RXTXCommDriver implements CommDriver
 						"ttyS", // linux Serial Ports
 						"ttySA", // for the IPAQs
 						"ttyUSB", // for USB frobs
+						"ttyACM", // linux CDC ACM devices
 						"rfcomm",       // bluetooth serial device
 						"ttyircomm", // linux IrCommdevices (IrDA serial emu)
 						};