diff --git a/libc/private/resolv_iface.h b/libc/private/resolv_iface.h
new file mode 100644
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--- /dev/null
+++ b/libc/private/resolv_iface.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#ifndef _RESOLV_IFACE_H
+#define _RESOLV_IFACE_H
+
+/* This header contains declarations related to per-interface DNS
+ * server selection. They are used by system/netd/ and should not be
+ * exposed by the C library's public NDK headers.
+ *
+ * NOTE: <resolv.h> contains the same declarations, this will be removed
+ *        when we change system/netd to use this header instead.
+ */
+#include <sys/cdefs.h>
+#include <netinet/in.h>
+
+__BEGIN_DECLS
+
+/* Use a guard macro until we remove the same definitions from <resolv.h> */
+#ifndef _BIONIC_RESOLV_IFACE_FUNCTIONS_DECLARED
+#define _BIONIC_RESOLV_IFACE_FUNCTIONS_DECLARED
+
+/* Set name of default interface */
+extern void _resolv_set_default_iface(const char* ifname);
+
+/* set name servers for an interface */
+extern void _resolv_set_nameservers_for_iface(const char* ifname, char** servers, int numservers);
+
+/* tell resolver of the address of an interface */
+extern void _resolv_set_addr_of_iface(const char* ifname, struct in_addr* addr);
+
+/* flush the cache associated with the default interface */
+extern void _resolv_flush_cache_for_default_iface();
+
+/* flush the cache associated with a certain interface */
+extern void _resolv_flush_cache_for_iface(const char* ifname);
+
+#endif /* _BIONIC_RESOLV_IFACE_FUNCTIONS_DECLARED */
+
+__END_DECLS
+
+#endif /* _RESOLV_IFACE_H */