diff --git a/lib/std/c.zig b/lib/std/c.zig
index a366c0ca63ae94e088145852a43e2b405b44ae09..e7b62f6728811704e5dfb9a332e50b4e032941b5 100644
--- a/lib/std/c.zig
+++ b/lib/std/c.zig
@@ -5998,7 +5998,7 @@ pub const IFNAMESIZE = switch (native_os) {
 pub const stack_t = switch (native_os) {
     .linux => linux.stack_t,
     .emscripten => emscripten.stack_t,
-    .freebsd => extern struct {
+    .freebsd, .openbsd => extern struct {
         /// Signal stack base.
         sp: *anyopaque,
         /// Signal stack length.