diff --git a/include/arpa/nameser.h b/include/arpa/nameser.h
new file mode 100644
index 0000000..0126a60
--- /dev/null
+++ b/include/arpa/nameser.h
@@ -0,0 +1,23 @@
+/*
+ * Public domain
+ * arpa/inet.h compatibility shim
+ */
+
+#ifndef _WIN32
+#include_next <arpa/nameser.h>
+#else
+#include <win32netcompat.h>
+
+#ifndef INADDRSZ
+#define INADDRSZ 4
+#endif
+
+#ifndef IN6ADDRSZ
+#define IN6ADDRSZ 16
+#endif
+
+#ifndef INT16SZ
+#define INT16SZ	2
+#endif
+
+#endif