diff --git a/multimedia/libdvdread/files/patch-dvdread::bswap.h b/multimedia/libdvdread/files/patch-dvdread::bswap.h
index 4bb3524c93dc..02bb51851df8 100644
--- a/multimedia/libdvdread/files/patch-dvdread::bswap.h
+++ b/multimedia/libdvdread/files/patch-dvdread::bswap.h
@@ -1,10 +1,12 @@
---- dvdread/bswap.h.orig	Wed Mar  5 23:13:17 2003
-+++ dvdread/bswap.h	Wed Mar  5 23:14:24 2003
-@@ -57,7 +57,15 @@
+--- dvdread/bswap.h.orig	Sat Nov 13 17:18:54 2004
++++ dvdread/bswap.h	Sat Nov 13 18:01:26 2004
+@@ -57,7 +57,19 @@
  #include <sys/endian.h>
  #define B2N_16(x) x = be16toh(x)
  #define B2N_32(x) x = be32toh(x)
--#define B2N_64(x) x = be64toh(x)
++# if __FreeBSD_version >= 510000
+ #define B2N_64(x) x = be64toh(x)
++# else
 +#define B2N_64(x) x = \
 + x = ((((x) & 0xff00000000000000) >> 56) | \
 +      (((x) & 0x00ff000000000000) >> 40) | \
@@ -14,6 +16,7 @@
 +      (((x) & 0x0000000000ff0000) << 24) | \
 +      (((x) & 0x000000000000ff00) << 40) | \
 +      (((x) & 0x00000000000000ff) << 56))
++# endif
  
  /* This is a slow but portable implementation, it has multiple evaluation 
   * problems so beware.