diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c
index bcf478127a62..ffdee489f169 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c
@@ -1393,6 +1393,7 @@ zfs_domount(vfs_t *vfsp, char *osname)
 	vfsp->mnt_kern_flag |= MNTK_SHARED_WRITES;
 	vfsp->mnt_kern_flag |= MNTK_EXTENDED_SHARED;
 	vfsp->mnt_kern_flag |= MNTK_NO_IOPF;	/* vn_io_fault can be used */
+	vfsp->mnt_kern_flag |= MNTK_NOMSYNC;
 
 	/*
 	 * The fsid is 64 bits, composed of an 8-bit fs type, which