diff --git a/src/comm/XbeeLinkInterface.h b/src/comm/XbeeLinkInterface.h
index 37fd9249912d205c1cda44b24418165df1d007fc..d359f579d7a5ab64b58de534f8fd991eb031b448 100644
--- a/src/comm/XbeeLinkInterface.h
+++ b/src/comm/XbeeLinkInterface.h
@@ -10,8 +10,8 @@ class XbeeLinkInterface : public LinkInterface
     Q_OBJECT
 
 public:
-    virtual QString getPortName() = 0;
-    virtual int getBaudRate() = 0;
+    virtual QString getPortName() const = 0;
+    virtual int getBaudRate() const = 0;
 
 public slots:
     virtual bool setPortName(QString portName) = 0;