diff --git a/src/unix/linux_like/linux/musl/b64/s390x.rs b/src/unix/linux_like/linux/musl/b64/s390x.rs
index 06cc61685b7ac..490d130c65bc4 100644
--- a/src/unix/linux_like/linux/musl/b64/s390x.rs
+++ b/src/unix/linux_like/linux/musl/b64/s390x.rs
@@ -84,6 +84,31 @@ s! {
         pub f_flags: c_uint,
         pub f_spare: [c_uint; 4],
     }
+
+    pub struct __psw_t {
+        pub mask: c_ulong,
+        pub addr: c_ulong,
+    }
+
+    pub struct fpregset_t {
+        pub fpc: c_uint,
+        pub fprs: [fpreg_t; 16],
+    }
+
+    pub struct mcontext_t {
+        pub psw: __psw_t,
+        pub gregs: [c_ulong; 16],
+        pub aregs: [c_uint; 16],
+        pub fpregs: fpregset_t,
+    }
+
+    pub struct ucontext_t {
+        pub uc_flags: c_ulong,
+        pub uc_link: *mut ucontext_t,
+        pub uc_stack: crate::stack_t,
+        pub uc_mcontext: mcontext_t,
+        pub uc_sigmask: crate::sigset_t,
+    }
 }
 
 s_no_extra_traits! {