diff --git a/src/new/glibc/sysdeps/unix/linux/bits/statvfs.rs b/src/new/glibc/sysdeps/unix/linux/bits/statvfs.rs
index 03fc1ac84727..a8e36ca11981 100644
--- a/src/new/glibc/sysdeps/unix/linux/bits/statvfs.rs
+++ b/src/new/glibc/sysdeps/unix/linux/bits/statvfs.rs
@@ -37,15 +37,12 @@ s! {
         pub f_ffree: u64,
         pub f_favail: u64,
         pub f_fsid: c_ulong,
-        // FIXME(riscv32): glibc declares this field on riscv32 too, but we have
-        // never declared it here.
+        // Mirrors `_STATVFSBUF_F_UNUSED` in the header. x32 is excluded because
+        // its `__SYSCALL_WORDSIZE` is 64, aarch64 because glibc always sets
+        // `__WORDSIZE` to 64.
         #[cfg(all(
             target_pointer_width = "32",
-            not(any(
-                target_arch = "x86_64",
-                target_arch = "aarch64",
-                target_arch = "riscv32"
-            ))
+            not(any(target_arch = "x86_64", target_arch = "aarch64"))
         ))]
         __f_unused: Padding<c_int>,
         pub f_flag: c_ulong,