--- /dev/null
+--- libmkv.orig/src/matroska.c 2009-01-12 23:14:26.000000000 -0800
++++ libmkv/src/matroska.c 2009-03-25 15:22:30.000000000 -0700
+@@ -27,6 +27,11 @@
+
+ #include <sys/time.h>
+
++#if defined( __MINGW32__ )
++#undef fseeko
++#define fseeko fseeko64
++#endif
++
+ #define RESERVED_SEEKHEAD 0x100
+ /* 256 bytes should be enough room for our Seek entries. */
+ #define RESERVED_CHAPTERS 0x800
+@@ -34,7 +39,7 @@
+
+ int mk_seekFile(mk_Writer *w, uint64_t pos)
+ {
+- if (fseek(w->fp, pos, SEEK_SET))
++ if (fseeko(w->fp, pos, SEEK_SET))
+ return -1;
+
+ w->f_pos = pos;
+