diff --git a/src/areachart/qareaseries.cpp b/src/areachart/qareaseries.cpp
index 4f08df5..fa89ba9 100644
--- a/src/areachart/qareaseries.cpp
+++ b/src/areachart/qareaseries.cpp
@@ -103,7 +103,7 @@ QAreaSeries::QAreaSeries(QLineSeries *upperSeries, QLineSeries *lowerSeries)
 }
 
 /*!
-    Constructs area series object without upper or lower series.
+    Constructs area series object without upper or lower series with \a parent object.
 */
 QAreaSeries::QAreaSeries(QObject *parent)
     : QAbstractSeries(*new QAreaSeriesPrivate(0, 0, this), parent)
diff --git a/src/axis/qaxiscategories.cpp b/src/axis/qaxiscategories.cpp
index 943614d..0788ad3 100644
--- a/src/axis/qaxiscategories.cpp
+++ b/src/axis/qaxiscategories.cpp
@@ -39,6 +39,9 @@ d_ptr(new QAxisCategoriesPrivate(this))
 
 }
 
+/*!
+  Destroys the object.
+*/
 QAxisCategories::~QAxisCategories()
 {
 
diff --git a/src/splinechart/qsplineseries.cpp b/src/splinechart/qsplineseries.cpp
index 6c5850f..fa84abd 100644
--- a/src/splinechart/qsplineseries.cpp
+++ b/src/splinechart/qsplineseries.cpp
@@ -65,6 +65,9 @@ QSplineSeries::QSplineSeries(QObject *parent) :
     QObject::connect(this,SIGNAL(pointReplaced(int)), d, SLOT(updateControlPoints()));
 }
 
+/*!
+  Destroys the object.
+*/
 QSplineSeries::~QSplineSeries()
 {
     Q_D(QSplineSeries);