diff --git a/libc-test/semver/linux-gnu-s390x.txt b/libc-test/semver/linux-gnu-s390x.txt
index ec90f4184b638..d52ba2a2a1422 100644
--- a/libc-test/semver/linux-gnu-s390x.txt
+++ b/libc-test/semver/linux-gnu-s390x.txt
@@ -1,4 +1,10 @@
 PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
 PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP
 PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
+getcontext
+makecontext
+mcontext_t
+setcontext
+swapcontext
 sysctl
+ucontext_t
diff --git a/libc-test/semver/linux-s390x.txt b/libc-test/semver/linux-s390x.txt
index ac59c8eaee4d2..f2a16a6d8fe62 100644
--- a/libc-test/semver/linux-s390x.txt
+++ b/libc-test/semver/linux-s390x.txt
@@ -103,11 +103,5 @@ __psw_t
 flock64
 fpreg_t
 fpregset_t
-getcontext
 greg_t
-makecontext
-mcontext_t
-setcontext
-swapcontext
 termios2
-ucontext_t
diff --git a/src/unix/linux_like/linux/musl/b64/s390x.rs b/src/unix/linux_like/linux/musl/b64/s390x.rs
index d8ce68e662089..744d148921f12 100644
--- a/src/unix/linux_like/linux/musl/b64/s390x.rs
+++ b/src/unix/linux_like/linux/musl/b64/s390x.rs
@@ -161,8 +161,8 @@ pub const SA_NOCLDWAIT: c_int = 2;
 pub const SA_ONSTACK: c_int = 0x08000000;
 pub const SA_SIGINFO: c_int = 4;
 pub const SIGBUS: c_int = 7;
-pub const SIGSTKSZ: size_t = 0x2000;
-pub const MINSIGSTKSZ: size_t = 2048;
+pub const SIGSTKSZ: size_t = 10240;
+pub const MINSIGSTKSZ: size_t = 4096;
 pub const SIG_SETMASK: c_int = 2;
 
 pub const O_NOCTTY: c_int = 256;