diff --git a/kmod/src/ioctl.c b/kmod/src/ioctl.c
index dc3d12da..014527ec 100644
--- a/kmod/src/ioctl.c
+++ b/kmod/src/ioctl.c
@@ -546,11 +546,6 @@ static long scoutfs_ioc_stat_more(struct file *file, unsigned long arg)
 	struct scoutfs_inode_info *si = SCOUTFS_I(inode);
 	struct scoutfs_ioctl_stat_more stm;
 
-	if (get_user(stm.valid_bytes, (__u64 __user *)arg))
-		return -EFAULT;
-
-	stm.valid_bytes = min_t(u64, stm.valid_bytes,
-				sizeof(struct scoutfs_ioctl_stat_more));
 	stm.meta_seq = scoutfs_inode_meta_seq(inode);
 	stm.data_seq = scoutfs_inode_data_seq(inode);
 	stm.data_version = scoutfs_inode_data_version(inode);
@@ -558,7 +553,7 @@ static long scoutfs_ioc_stat_more(struct file *file, unsigned long arg)
 	stm.crtime_sec = si->crtime.tv_sec;
 	stm.crtime_nsec = si->crtime.tv_nsec;
 
-	if (copy_to_user((void __user *)arg, &stm, stm.valid_bytes))
+	if (copy_to_user((void __user *)arg, &stm, sizeof(stm)))
 		return -EFAULT;
 
 	return 0;
@@ -879,9 +874,6 @@ static long scoutfs_ioc_statfs_more(struct file *file, unsigned long arg)
 	struct scoutfs_ioctl_statfs_more sfm;
 	int ret;
 
-	if (get_user(sfm.valid_bytes, (__u64 __user *)arg))
-		return -EFAULT;
-
 	super = kzalloc(sizeof(struct scoutfs_super_block), GFP_NOFS);
 	if (!super)
 		return -ENOMEM;
@@ -890,8 +882,6 @@ static long scoutfs_ioc_statfs_more(struct file *file, unsigned long arg)
 	if (ret)
 		goto out;
 
-	sfm.valid_bytes = min_t(u64, sfm.valid_bytes,
-				sizeof(struct scoutfs_ioctl_statfs_more));
 	sfm.fsid = le64_to_cpu(super->hdr.fsid);
 	sfm.rid = sbi->rid;
 	sfm.total_meta_blocks = le64_to_cpu(super->total_meta_blocks);
@@ -902,7 +892,7 @@ static long scoutfs_ioc_statfs_more(struct file *file, unsigned long arg)
 	if (ret)
 		goto out;
 
-	if (copy_to_user((void __user *)arg, &sfm, sfm.valid_bytes))
+	if (copy_to_user((void __user *)arg, &sfm, sizeof(sfm)))
 		ret = -EFAULT;
 	else
 		ret = 0;
diff --git a/kmod/src/ioctl.h b/kmod/src/ioctl.h
index f0f0037d..940d67f3 100644
--- a/kmod/src/ioctl.h
+++ b/kmod/src/ioctl.h
@@ -215,18 +215,8 @@ struct scoutfs_ioctl_stage {
 /*
  * Give the user inode fields that are not otherwise visible.  statx()
  * isn't always available and xattrs are relatively expensive.
- *
- * @valid_bytes stores the number of bytes that are valid in the
- * structure.  The caller sets this to the size of the struct that they
- * understand.  The kernel then fills and copies back the min of the
- * size they and the user caller understand.  The user can tell if a
- * field is set if all of its bytes are within the valid_bytes that the
- * kernel set on return.
- *
- * New fields are only added to the end of the struct.
  */
 struct scoutfs_ioctl_stat_more {
-	__u64 valid_bytes;
 	__u64 meta_seq;
 	__u64 data_seq;
 	__u64 data_version;
@@ -356,21 +346,11 @@ struct scoutfs_ioctl_search_xattrs {
 /*
  * Give the user information about the filesystem.
  *
- * @valid_bytes stores the number of bytes that are valid in the
- * structure.  The caller sets this to the size of the struct that they
- * understand.  The kernel then fills and copies back the min of the
- * size they and the user caller understand.  The user can tell if a
- * field is set if all of its bytes are within the valid_bytes that the
- * kernel set on return.
- *
  * @committed_seq: All seqs up to and including this seq have been
  * committed.  Can be compared with meta_seq and data_seq from inodes in
  * stat_more to discover if changes have been committed to disk.
- *
- * New fields are only added to the end of the struct.
  */
 struct scoutfs_ioctl_statfs_more {
-	__u64 valid_bytes;
 	__u64 fsid;
 	__u64 rid;
 	__u64 committed_seq;
diff --git a/tests/src/stage_tmpfile.c b/tests/src/stage_tmpfile.c
index 35cc403b..8ecfc042 100644
--- a/tests/src/stage_tmpfile.c
+++ b/tests/src/stage_tmpfile.c
@@ -113,7 +113,6 @@ int main(int argc, char **argv)
 	}
 
 	// get current data_version after fallocate's size extensions
-	stm.valid_bytes = sizeof(struct scoutfs_ioctl_stat_more);
 	ret = ioctl(dest_fd, SCOUTFS_IOC_STAT_MORE, &stm);
 	if (ret < 0) {
 		perror("stat_more ioctl error");
diff --git a/utils/src/df.c b/utils/src/df.c
index 585d658c..53e28b99 100644
--- a/utils/src/df.c
+++ b/utils/src/df.c
@@ -48,7 +48,6 @@ static int do_df(struct df_args *args)
 	if (fd < 0)
 		return fd;
 
-	sfm.valid_bytes = sizeof(struct scoutfs_ioctl_statfs_more);
 	ret = ioctl(fd, SCOUTFS_IOC_STATFS_MORE, &sfm);
 	if (ret < 0) {
 		fprintf(stderr, "statfs_more returned %d: error %s (%d)\n",
diff --git a/utils/src/stat.c b/utils/src/stat.c
index a0679a71..6b8ae407 100644
--- a/utils/src/stat.c
+++ b/utils/src/stat.c
@@ -131,12 +131,10 @@ static int do_stat(struct stat_args *args)
 	if (args->is_inode) {
 		cmd = SCOUTFS_IOC_STAT_MORE;
 		fields = inode_fields;
-		st.stm.valid_bytes = sizeof(struct scoutfs_ioctl_stat_more);
 		pr = print_inode_field;
 	} else {
 		cmd = SCOUTFS_IOC_STATFS_MORE;
 		fields = fs_fields;
-		st.sfm.valid_bytes = sizeof(struct scoutfs_ioctl_statfs_more);
 		pr = print_fs_field;
 	}