diff --git a/lib/std/os/linux/s390x.zig b/lib/std/os/linux/s390x.zig
index 71594d4a6509c4d279c6da94baaa2cafa42f08b3..86495f6f7953a9f1338d473c8162f75c2690e2a6 100644
--- a/lib/std/os/linux/s390x.zig
+++ b/lib/std/os/linux/s390x.zig
@@ -269,7 +269,12 @@ pub const ucontext_t = extern struct {
 };
 
 pub const mcontext_t = extern struct {
-    __regs1: [18]u64,
-    __regs2: [18]u32,
-    __regs3: [16]f64,
+    psw: extern struct {
+        mask: u64,
+        addr: u64,
+    },
+    gregs: [16]u64,
+    aregs: [16]u32,
+    fpc: u32,
+    fregs: [16]f64,
 };