diff --git a/codex-rs/process-hardening/src/lib.rs b/codex-rs/process-hardening/src/lib.rs
index 0a624fb38..772647671 100644
--- a/codex-rs/process-hardening/src/lib.rs
+++ b/codex-rs/process-hardening/src/lib.rs
@@ -29,6 +29,7 @@ const PTRACE_DENY_ATTACH_FAILED_EXIT_CODE: i32 = 6;
     target_os = "android",
     target_os = "macos",
     target_os = "freebsd",
+    target_os = "netbsd",
     target_os = "openbsd"
 ))]
 const SET_RLIMIT_CORE_FAILED_EXIT_CODE: i32 = 7;