diff --git a/src/unix/bsd/netbsdlike/netbsd/aarch64.rs b/src/unix/bsd/netbsdlike/netbsd/aarch64.rs
index c429dd78c0f1..c2f122ad837e 100644
--- a/src/unix/bsd/netbsdlike/netbsd/aarch64.rs
+++ b/src/unix/bsd/netbsdlike/netbsd/aarch64.rs
@@ -65,7 +65,7 @@ cfg_if! {
     }
 }
 
-pub(crate) const _ALIGNBYTES: usize = size_of::<c_int>() - 1;
+pub(crate) const _ALIGNBYTES: usize = size_of::<u128>() - 1;
 
 pub const PT_GETREGS: c_int = PT_FIRSTMACH + 0;
 pub const PT_SETREGS: c_int = PT_FIRSTMACH + 1;