diff --git a/avrdude/serial.h b/avrdude/serial.h
index 8fbef14b..c3071d74 100644
--- a/avrdude/serial.h
+++ b/avrdude/serial.h
@@ -33,7 +33,7 @@
 extern long serial_recv_timeout;
 
 extern int serial_open(char * port, long baud);
-extern int serial_setattr(int fd, long baud);
+extern int serial_setspeed(int fd, long baud);
 extern void serial_close(int fd);
 
 extern int serial_send(int fd, char * buf, size_t buflen);