diff --git a/src/buffer.h b/src/buffer.h
index 903604f7..06f2cf35 100755
--- a/src/buffer.h
+++ b/src/buffer.h
@@ -469,7 +469,7 @@ public:
         return false;
     }
 
-    CVector<TData>& Get()
+    const CVector<TData>& Get()
     {
         iPutPos = 0;
         return vecsMemory;
diff --git a/src/channel.h b/src/channel.h
index 2a88f7b2..f68870d0 100755
--- a/src/channel.h
+++ b/src/channel.h
@@ -79,7 +79,7 @@ public:
 
     void SetAddress ( const CHostAddress NAddr ) { InetAddr = NAddr; }
     bool GetAddress ( CHostAddress& RetAddr );
-    CHostAddress& GetAddress() { return InetAddr; }
+    const CHostAddress& GetAddress() const { return InetAddr; }
 
     void ResetInfo() { ChannelInfo = CChannelCoreInfo(); } // reset does not emit a message
     void SetName ( const QString sNNa );
diff --git a/src/util.h b/src/util.h
index 5878e263..b5c1fce5 100755
--- a/src/util.h
+++ b/src/util.h
@@ -535,7 +535,7 @@ public:
     }
 
     // compare operator
-    bool operator== ( const CHostAddress& CompAddr )
+    bool operator== ( const CHostAddress& CompAddr ) const
     {
         return ( ( CompAddr.InetAddr == InetAddr ) &&
                  ( CompAddr.iPort    == iPort ) );