diff --git a/module/zfs/vdev.c b/module/zfs/vdev.c
index 2754769eb759..a8ae2d1305dd 100644
--- a/module/zfs/vdev.c
+++ b/module/zfs/vdev.c
@@ -4674,7 +4674,7 @@ vdev_clear(spa_t *spa, vdev_t *vd)
 	vd->vdev_stat.vs_checksum_errors = 0;
 	vd->vdev_stat.vs_dio_verify_errors = 0;
 	vd->vdev_stat.vs_slow_ios = 0;
-	atomic_store_64(&vd->vdev_outlier_count, 0);
+	atomic_store_64((volatile uint64_t *)&vd->vdev_outlier_count, 0);
 	vd->vdev_read_sit_out_expire = 0;
 
 	for (int c = 0; c < vd->vdev_children; c++)
diff --git a/tests/zfs-tests/cmd/mmap_seek.c b/tests/zfs-tests/cmd/mmap_seek.c
index f46980cad111..648f59ae3620 100644
--- a/tests/zfs-tests/cmd/mmap_seek.c
+++ b/tests/zfs-tests/cmd/mmap_seek.c
@@ -55,7 +55,7 @@ seek_expect(int fd, off_t offset, int whence, off_t expect_offset)
 		return;
 
 	int err = errno;
-	fprintf(stderr, "lseek(fd, %ld, SEEK_%s) = %ld (expected %ld)",
+	fprintf(stderr, "lseek(fd, %jd, SEEK_%s) = %jd (expected %jd)",
 	    offset, (whence == SEEK_DATA ? "DATA" : "HOLE"),
 	    seek_offset, expect_offset);
 	if (err != 0)