--- bluez-5.12.orig/tools/csr_usb.c	2013-09-16 10:36:07.000000000 +0200
+++ bluez-5.12/tools/csr_usb.c	2013-12-21 19:22:48.000000000 +0100
@@ -29,6 +29,7 @@
 #include <errno.h>
 #include <ctype.h>
 #include <fcntl.h>
+#include <limits.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>