1 files changed, 0 insertions, 2 deletions
diff --git a/io.c b/io.c
index b89b87b29f..cab47d08b0 100644
--- a/io.c
+++ b/io.c
@@ -727,8 +727,6 @@ flush_before_seek(rb_io_t *fptr)
 # define SEEK_END 2
 #endif
 
-#define FMODE_SYNCWRITE (FMODE_SYNC|FMODE_WRITABLE)
-
 void
 rb_io_check_char_readable(rb_io_t *fptr)
 {