--- a/src/mesh/model/dot11s/ie-dot11s-beacon-timing.cc	Wed May 15 09:54:01 2013 -0400
+++ b/src/mesh/model/dot11s/ie-dot11s-beacon-timing.cc	Wed May 15 09:55:22 2013 -0400
@@ -189,7 +189,7 @@
           && (a.GetBeaconInterval () == b.GetBeaconInterval ()));
 }
 bool
-IeBeaconTiming::operator== (WifiInformationElement const & a)
+IeBeaconTiming::operator== (WifiInformationElement const & a) const
 {
   try {
       IeBeaconTiming const & aa = dynamic_cast<IeBeaconTiming const &>(a);

--- a/src/mesh/model/dot11s/ie-dot11s-beacon-timing.h	Wed May 15 09:54:01 2013 -0400
+++ b/src/mesh/model/dot11s/ie-dot11s-beacon-timing.h	Wed May 15 09:55:22 2013 -0400
@@ -93,7 +93,7 @@
   virtual uint8_t DeserializeInformationField (Buffer::Iterator i, uint8_t length);
   virtual void Print (std::ostream& os) const;
   ///\}
-  bool operator== (WifiInformationElement const & a);
+  bool operator== (WifiInformationElement const & a) const;
 private:
   /**
    * Converters: