#define F_DMINOR(f) OPT_EXTRA(f, HLINK_BUMP(f) + 1)->unum
/* The sum is only present on regular files. */
-#define F_SUM(f) ((const char*)OPT_EXTRA(f, LEN64_BUMP(f) + SUM_EXTRA_CNT - 1))
+#define F_SUM(f) ((const char*)OPT_EXTRA(f, LEN64_BUMP(f) + HLINK_BUMP(f) \
+ + SUM_EXTRA_CNT - 1))
/* A couple bool-type utility functions: */
#define F_IS_HLINKED(f) ((f)->flags & FLAG_HLINKED)