--- cdc-acm.h-dist	2011-05-10 19:43:18.000000000 +0200
+++ cdc-acm.h	2011-05-10 19:43:40.000000000 +0200
@@ -137,3 +137,4 @@
 #define SINGLE_RX_URB			2
 #define NO_CAP_LINE			4
 #define NOT_A_MODEM			8
+#define NO_DATA_INTERFACE		16