diff --git a/lib/std/c.zig b/lib/std/c.zig
index 87db7f370f5ed4302a8245adf7dbc474d4a68d44..53117959cc26bba62e285b4eec01ca26021bba5d 100644
--- a/lib/std/c.zig
+++ b/lib/std/c.zig
@@ -11099,7 +11099,7 @@ pub const pthread_cancelstate = switch (native_os) {
         ENABLE = 1,
         DISABLE = 0,
     },
-    .dragonfly, .freebsd, .haiku => enum(c_int) {
+    .dragonfly, .freebsd, .haiku, .openbsd => enum(c_int) {
         ENABLE = 0,
         DISABLE = 1,
     },