diff --git a/lib/std/os/linux/arm-eabi.zig b/lib/std/os/linux/arm-eabi.zig
index 287c61c49d..613957fa25 100644
--- a/lib/std/os/linux/arm-eabi.zig
+++ b/lib/std/os/linux/arm-eabi.zig
@@ -744,7 +744,7 @@ pub const mcontext_t = extern struct {
 
 pub const ucontext_t = extern struct {
     flags: usize,
-    link: *ucontext_t,
+    link: ?*ucontext_t,
     stack: stack_t,
     mcontext: mcontext_t,
     sigmask: sigset_t,
diff --git a/lib/std/os/linux/arm64.zig b/lib/std/os/linux/arm64.zig
index 9cb66c3fcf..92edc8a5e0 100644
--- a/lib/std/os/linux/arm64.zig
+++ b/lib/std/os/linux/arm64.zig
@@ -586,7 +586,7 @@ pub const mcontext_t = extern struct {
 
 pub const ucontext_t = extern struct {
     flags: usize,
-    link: *ucontext_t,
+    link: ?*ucontext_t,
     stack: stack_t,
     sigmask: sigset_t,
     mcontext: mcontext_t,
diff --git a/lib/std/os/linux/i386.zig b/lib/std/os/linux/i386.zig
index f5768aed71..e683501ecb 100644
--- a/lib/std/os/linux/i386.zig
+++ b/lib/std/os/linux/i386.zig
@@ -757,7 +757,7 @@ pub const REG = struct {
 
 pub const ucontext_t = extern struct {
     flags: usize,
-    link: *ucontext_t,
+    link: ?*ucontext_t,
     stack: stack_t,
     mcontext: mcontext_t,
     sigmask: sigset_t,
diff --git a/lib/std/os/linux/powerpc.zig b/lib/std/os/linux/powerpc.zig
index d1ef2b4a21..e45be74f77 100644
--- a/lib/std/os/linux/powerpc.zig
+++ b/lib/std/os/linux/powerpc.zig
@@ -740,7 +740,7 @@ pub const mcontext_t = extern struct {
 
 pub const ucontext_t = extern struct {
     flags: u32,
-    link: *ucontext_t,
+    link: ?*ucontext_t,
     stack: stack_t,
     pad: [7]i32,
     regs: *mcontext_t,
diff --git a/lib/std/os/linux/powerpc64.zig b/lib/std/os/linux/powerpc64.zig
index f1758c2b02..19d5f04bd3 100644
--- a/lib/std/os/linux/powerpc64.zig
+++ b/lib/std/os/linux/powerpc64.zig
@@ -727,7 +727,7 @@ pub const mcontext_t = extern struct {
 
 pub const ucontext_t = extern struct {
     flags: u32,
-    link: *ucontext_t,
+    link: ?*ucontext_t,
     stack: stack_t,
     sigmask: sigset_t,
     mcontext: mcontext_t,
diff --git a/lib/std/os/linux/sparc64.zig b/lib/std/os/linux/sparc64.zig
index 231cd0a283..2f9efecae4 100644
--- a/lib/std/os/linux/sparc64.zig
+++ b/lib/std/os/linux/sparc64.zig
@@ -821,7 +821,7 @@ pub const mcontext_t = extern struct {
 };
 
 pub const ucontext_t = extern struct {
-    link: *ucontext_t,
+    link: ?*ucontext_t,
     flags: u64,
     sigmask: u64,
     mcontext: mcontext_t,
diff --git a/lib/std/os/linux/x86_64.zig b/lib/std/os/linux/x86_64.zig
index 0aaa28262c..8913d10585 100644
--- a/lib/std/os/linux/x86_64.zig
+++ b/lib/std/os/linux/x86_64.zig
@@ -736,7 +736,7 @@ pub const mcontext_t = extern struct {
 
 pub const ucontext_t = extern struct {
     flags: usize,
-    link: *ucontext_t,
+    link: ?*ucontext_t,
     stack: stack_t,
     mcontext: mcontext_t,
     sigmask: sigset_t,