diff --git a/src/devices/mesh/dot11s/peer-link-frame.cc b/src/devices/mesh/dot11s/peer-link-frame.cc
index b07fd54db..607557966 100644
--- a/src/devices/mesh/dot11s/peer-link-frame.cc
+++ b/src/devices/mesh/dot11s/peer-link-frame.cc
@@ -69,7 +69,7 @@ PeerLinkFrameStart::SetPlinkFrameStart (PeerLinkFrameStart::PlinkFrameStartField
     }
 }
 PeerLinkFrameStart::PlinkFrameStartFields
-PeerLinkFrameStart::GetFields ()
+PeerLinkFrameStart::GetFields () const
 {
   PlinkFrameStartFields retval;
   //TODO: protocol version:
diff --git a/src/devices/mesh/dot11s/peer-link-frame.h b/src/devices/mesh/dot11s/peer-link-frame.h
index 20a24c93b..f94c32769 100644
--- a/src/devices/mesh/dot11s/peer-link-frame.h
+++ b/src/devices/mesh/dot11s/peer-link-frame.h
@@ -62,7 +62,7 @@ public:
   //action header knows about subtype
   void SetPlinkFrameSubtype (uint8_t subtype);
   void SetPlinkFrameStart (PlinkFrameStartFields);
-  PlinkFrameStartFields GetFields ();
+  PlinkFrameStartFields GetFields () const;
   /** \name Inherited from header:
    * \{
    */