1 files changed, 0 insertions, 1 deletions
diff --git a/diff.h b/diff.h
index c3798a104..d53e5a2da 100644
--- a/diff.h
+++ b/diff.h
@@ -106,7 +106,6 @@ static inline void diff_flags_or(struct diff_flags *a,
 		tmp_a[i] |= tmp_b[i];
 }
 
-#define DIFF_OPT_SET(opts, flag)	((opts)->flags.flag = 1)
 #define DIFF_OPT_CLR(opts, flag)	((opts)->flags.flag = 0)
 
 #define DIFF_XDL_TST(opts, flag)    ((opts)->xdl_opts & XDF_##flag)