diff --git a/getaddr.h b/getaddr.h
new file mode 100644
index 0000000..5718e62
--- /dev/null
+++ b/getaddr.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2011 Daniel Drown
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * getaddr.h - get a locally configured address
+ */
+#ifndef __GETADDR_H__
+#define __GETADDR_H__
+
+union anyip {
+  struct in6_addr ip6;
+  struct in_addr ip4;
+};
+
+union anyip *getinterface_ip(const char *interface, int family);
+
+#endif