diff --git a/src/mesh/model/dot11s/ie-dot11s-beacon-timing.cc b/src/mesh/model/dot11s/ie-dot11s-beacon-timing.cc
index 54fb803aa..f0a667f5f 100644
--- a/src/mesh/model/dot11s/ie-dot11s-beacon-timing.cc
+++ b/src/mesh/model/dot11s/ie-dot11s-beacon-timing.cc
@@ -189,7 +189,7 @@ operator== (const IeBeaconTimingUnit & a, const IeBeaconTimingUnit & b)
           && (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);
diff --git a/src/mesh/model/dot11s/ie-dot11s-beacon-timing.h b/src/mesh/model/dot11s/ie-dot11s-beacon-timing.h
index 0f5ed303f..fbe677c15 100644
--- a/src/mesh/model/dot11s/ie-dot11s-beacon-timing.h
+++ b/src/mesh/model/dot11s/ie-dot11s-beacon-timing.h
@@ -93,7 +93,7 @@ public:
   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: