diff --git a/src/new/glibc/sysdeps/unix/linux/bits/statvfs.rs b/src/new/glibc/sysdeps/unix/linux/bits/statvfs.rs
index a8e36ca11981..872a29cec329 100644
--- a/src/new/glibc/sysdeps/unix/linux/bits/statvfs.rs
+++ b/src/new/glibc/sysdeps/unix/linux/bits/statvfs.rs
@@ -2,7 +2,7 @@
 
 use crate::prelude::*;
 
-s! {
+s2! {
     pub struct statvfs {
         pub f_bsize: c_ulong,
         pub f_frsize: c_ulong,
diff --git a/src/new/netbsd/sys/statvfs.rs b/src/new/netbsd/sys/statvfs.rs
index 2e8fe5e20216..525435ad91dd 100644
--- a/src/new/netbsd/sys/statvfs.rs
+++ b/src/new/netbsd/sys/statvfs.rs
@@ -7,7 +7,7 @@ use crate::prelude::*;
 const _VFS_NAMELEN: usize = 32;
 const _VFS_MNAMELEN: usize = 1024;
 
-s! {
+s2! {
     pub struct statvfs {
         pub f_flag: c_ulong,
         pub f_bsize: c_ulong,
@@ -38,8 +38,11 @@ s! {
         // This type is updated in a future version
         f_spare: Padding<[u32; 4]>,
 
+        #[custom_default([0; _VFS_NAMELEN])]
         pub f_fstypename: [c_char; _VFS_NAMELEN],
+        #[custom_default([0; _VFS_MNAMELEN])]
         pub f_mntonname: [c_char; _VFS_MNAMELEN],
+        #[custom_default([0; _VFS_MNAMELEN])]
         pub f_mntfromname: [c_char; _VFS_MNAMELEN],
         // Added in NetBSD10
         // pub f_mntfromlabel: [c_char; _VFS_MNAMELEN],