diff --git a/ieee80211.h b/ieee80211.h
new file mode 100644
index 0000000..5fa34bd
--- /dev/null
+++ b/ieee80211.h
@@ -0,0 +1,21 @@
+// Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SHILL_IEEE80211_H
+#define SHILL_IEEE80211_H
+
+namespace shill {
+
+namespace IEEE_80211 {
+const unsigned int kMaxSSIDLen = 32;
+
+const unsigned int kWEP40AsciiLen = 5;
+const unsigned int kWEP40HexLen = 10;
+const unsigned int kWEP104AsciiLen = 13;
+const unsigned int kWEP104HexLen = 26;
+};
+
+}  // namespace shill
+
+#endif  // SHILL_IEEE_80211_H