tags 749157 patch thanks Here's the patch from upstream: http://svnweb.freebsd.org/base?view=revision&revision=266664 --- head/lib/libusb/libusb.h Sun May 25 18:06:28 2014 (r266663) +++ head/lib/libusb/libusb.h Sun May 25 18:06:32 2014 (r266664) @@ -33,6 +33,8 @@ #include <sys/types.h> #endif +#define LIBUSB_CALL + #ifdef __cplusplus extern "C" { #endif