diff --git a/libc/netbsd/resolv/res_private.h b/libc/netbsd/resolv/res_private.h
new file mode 100644
index 0000000..8341913
--- /dev/null
+++ b/libc/netbsd/resolv/res_private.h
@@ -0,0 +1,22 @@
+/*	$NetBSD: res_private.h,v 1.1.1.1 2004/05/20 17:18:54 christos Exp $	*/
+
+#ifndef res_private_h
+#define res_private_h
+
+struct __res_state_ext {
+	union res_sockaddr_union nsaddrs[MAXNS];
+	struct sort_list {
+		int     af;
+		union {
+			struct in_addr  ina;
+			struct in6_addr in6a;
+		} addr, mask;
+	} sort_list[MAXRESOLVSORT];
+	char nsuffix[64];
+	char nsuffix2[64];
+};
+
+extern int
+res_ourserver_p(const res_state statp, const struct sockaddr *sa);
+
+#endif