diff --git a/src/blackmisc/aviobase.h b/src/blackmisc/aviobase.h
index 6421796fb..93d332243 100644
--- a/src/blackmisc/aviobase.h
+++ b/src/blackmisc/aviobase.h
@@ -33,7 +33,7 @@ namespace BlackMisc
              * \brief Are the set values valid / in range
              * \return
              */
-            virtual bool validValues()
+            virtual bool validValues() const
             {
                 return true;
             }
diff --git a/src/blackmisc/coordinateecef.h b/src/blackmisc/coordinateecef.h
index 85b859ad9..eadc0ac6a 100644
--- a/src/blackmisc/coordinateecef.h
+++ b/src/blackmisc/coordinateecef.h
@@ -114,8 +114,9 @@ namespace BlackMisc
              * \brief String for converter
              * \return
              */
-            virtual QString convertToQString() const
+            virtual QString convertToQString(bool i18n = false) const override
             {
+                Q_UNUSED(i18n)
                 QString s = "ECEF: {x %1, y %2, z %3}";
                 s = s.arg(QString::number(this->x(), 'f', 6)).
                     arg(QString::number(this->y(), 'f', 6)).
diff --git a/src/blackmisc/coordinategeodetic.h b/src/blackmisc/coordinategeodetic.h
index 9354d668d..5b448d64f 100644
--- a/src/blackmisc/coordinategeodetic.h
+++ b/src/blackmisc/coordinategeodetic.h
@@ -80,7 +80,7 @@ namespace BlackMisc
              * \param i18n
              * \return
              */
-            virtual QString convertToQString(bool i18n = false) const;
+            virtual QString convertToQString(bool i18n = false) const override;
 
             /*!
              * \copydoc CValueObject::getMetaTypeId
diff --git a/src/blackmisc/coordinatened.h b/src/blackmisc/coordinatened.h
index ac499aa26..cb727861d 100644
--- a/src/blackmisc/coordinatened.h
+++ b/src/blackmisc/coordinatened.h
@@ -27,8 +27,9 @@ namespace BlackMisc
              * \brief String for converter
              * \return
              */
-            virtual QString convertToQString() const
+            virtual QString convertToQString(bool i18n = false) const override
             {
+                Q_UNUSED(i18n)
                 QString s = "NED: {N %1, E %2, D %3}";
                 s = s.arg(QString::number(this->north(), 'f', 6)).
                     arg(QString::number(this->east(), 'f', 6)).