diff --git a/src/unix/linux_like/android/b64/aarch64/align.rs b/src/unix/linux_like/android/b64/aarch64/align.rs
index 154c2c54ce6de..9832303d7ac46 100644
--- a/src/unix/linux_like/android/b64/aarch64/align.rs
+++ b/src/unix/linux_like/android/b64/aarch64/align.rs
@@ -4,17 +4,19 @@ s_no_extra_traits! {
     pub struct max_align_t {
         priv_: [f32; 8]
     }
-}
 
-s! {
+    #[allow(missing_debug_implementations)]
     pub struct ucontext_t {
         pub uc_flags: ::c_ulong,
         pub uc_link: *mut ucontext_t,
         pub uc_stack: ::stack_t,
         pub uc_sigmask: ::sigset_t,
+        pub __pad: [u8; 1024 / 8 - ::core::mem::size_of::<::sigset_t>()],
         pub uc_mcontext: mcontext_t,
     }
+}
 
+s! {
     #[repr(align(16))]
     pub struct mcontext_t {
         pub fault_address: ::c_ulonglong,