ioctl("TIOCMGET"): Inappropriate ioctl for device

Hello,
I program my Atmega328p wireless with a WiFly RN171 using this code:

avrdude -v -p m328p -c arduino -P net:192.168.1.47:2000 -b 57600 -D -V -U flash:w:/tmp/build1141965372723797497.tmp/M_Xively.cpp.hex:i

This works, but one line shows an error:
ioctl("TIOCMGET"): Inappropriate ioctl for device

Here are the last lines of the output:

Writing | ################################################## | 100% 2.00s

avrdude: 4532 bytes of flash written

avrdude: safemode: lfuse reads as 0
avrdude: safemode: hfuse reads as 0
avrdude: safemode: efuse reads as 0
avrdude: safemode: Fuses OK
ioctl("TIOCMGET"): Inappropriate ioctl for device

avrdude done. Thank you.

Is the error message important?
Thanks Martin