diff --git a/io_u.c b/io_u.c
index f8ce8618c..f81086b65 100644
--- a/io_u.c
+++ b/io_u.c
@@ -815,7 +815,7 @@ static void set_rw_ddir(struct thread_data *td, struct io_u *io_u)
 	if (td->o.zone_mode == ZONE_MODE_ZBD)
 		ddir = zbd_adjust_ddir(td, io_u, ddir);
 
-	if (td_trimwrite(td)) {
+	if (td_trimwrite(td) && !ddir_sync(ddir)) {
 		struct fio_file *f = io_u->file;
 		if (f->last_start[DDIR_WRITE] == f->last_start[DDIR_TRIM])
 			ddir = DDIR_TRIM;