diff --git a/src/unix/linux_like/android/b32/arm.rs b/src/unix/linux_like/android/b32/arm.rs
index 66375876e776..fb88cd10af1b 100644
--- a/src/unix/linux_like/android/b32/arm.rs
+++ b/src/unix/linux_like/android/b32/arm.rs
@@ -31,7 +31,7 @@ s! {
 
     pub struct __c_anonymous_uc_sigmask_with_padding {
         pub uc_sigmask: crate::sigset_t,
-        /* Android has a wrong (smaller) sigset_t on x86. */
+        /* Android has a wrong (smaller) sigset_t on ARM. */
         __padding_rt_sigset: Padding<u32>,
     }
 
diff --git a/src/unix/linux_like/android/b64/aarch64/mod.rs b/src/unix/linux_like/android/b64/aarch64/mod.rs
index c8c48e5d9089..b33d2ef36fc7 100644
--- a/src/unix/linux_like/android/b64/aarch64/mod.rs
+++ b/src/unix/linux_like/android/b64/aarch64/mod.rs
@@ -62,6 +62,9 @@ s! {
         pub uc_link: *mut ucontext_t,
         pub uc_stack: crate::stack_t,
         pub uc_sigmask: crate::sigset_t,
+        /* The kernel adds extra padding after uc_sigmask to match
+         * glibc sigset_t on ARM64. */
+        __padding: Padding<[c_char; 128 - size_of::<crate::sigset_t>()]>,
         pub uc_mcontext: mcontext_t,
     }