diff --git a/libusb/hid.c b/libusb/hid.c
index 6c1d247..19da8e9 100644
--- a/libusb/hid.c
+++ b/libusb/hid.c
@@ -250,7 +250,7 @@ static int get_usage(uint8_t *report_descriptor, size_t size,
 }
 #endif /* INVASIVE_GET_USAGE */
 
-#ifdef __FreeBSD__
+#ifdef XXX__FreeBSD__
 /* The FreeBSD version of libusb doesn't have this funciton. In mainline
    libusb, it's inlined in libusb.h. This function will bear a striking
    resemblence to that one, because there's about one way to code it.