OpenBSD also uses res_init like NetBSD?
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index 611171a..54b2715 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -713,6 +713,7 @@
                    not(target_os = "macos"),
                    not(target_os = "ios"),
                    not(target_os = "netbsd"),
+                   not(target_os = "openbsd"),
                    not(target_os = "solaris"),
                    not(target_env = "musl")
                    ),