diff --git a/src/KChart/Cartesian/KChartCartesianAxis.cpp b/src/KChart/Cartesian/KChartCartesianAxis.cpp
--- a/src/KChart/Cartesian/KChartCartesianAxis.cpp
+++ b/src/KChart/Cartesian/KChartCartesianAxis.cpp
@@ -1014,8 +1014,8 @@
             qreal labelMargin = 0.0;
             QString text = it.text();
             if ( !text.isEmpty() ) {
-                QPointF labelPosition = plane->translate( QPointF( geoXy( drawPos, 1.0 ),
-                                                                   geoXy( 1.0, drawPos ) ) );
+                QPointF labelPosition = plane->translate( QPointF( geoXy( drawPos, qreal(1.0) ),
+                                                                   geoXy( qreal(1.0), drawPos ) ) );
                 highestLabelPosition = geoXy( labelPosition.x(), labelPosition.y() );
 
                 if ( it.type() == TickIterator::MajorTick ) {
@@ -1061,10 +1061,10 @@
                                    highestLabelLongitudinalSize * 0.5 );
     }
 
-    amountOfLeftOverlap = geoXy( startOverhang, 0.0 );
-    amountOfRightOverlap = geoXy( endOverhang, 0.0 );
-    amountOfBottomOverlap = geoXy( 0.0, startOverhang );
-    amountOfTopOverlap = geoXy( 0.0, endOverhang );
+    amountOfLeftOverlap = geoXy( startOverhang, qreal(0.0) );
+    amountOfRightOverlap = geoXy( endOverhang, qreal(0.0) );
+    amountOfBottomOverlap = geoXy( qreal(0.0), startOverhang );
+    amountOfTopOverlap = geoXy( qreal(0.0), endOverhang );
 
     const TextAttributes titleTA = titleTextAttributesWithAdjustedRotation();
     if ( titleTA.isVisible() && !axis()->titleText().isEmpty() ) {
diff --git a/src/KChart/Polar/KChartPieDiagram.cpp b/src/KChart/Polar/KChartPieDiagram.cpp
--- a/src/KChart/Polar/KChartPieDiagram.cpp
+++ b/src/KChart/Polar/KChartPieDiagram.cpp
@@ -280,7 +280,7 @@
             if ( maxOverhang > 0.0 ) {
                 // subtract 2x as much because every side only gets half of the total diameter reduction
                 // and we have to make up for the overhang on one particular side.
-                d->size -= qMin( d->size, maxOverhang * 2.0 );
+                d->size -= qMin<qreal>( d->size, maxOverhang * 2.0 );
                 tryAgain = true;
             }
         }
diff --git a/src/KChart/Polar/KChartRingDiagram.cpp b/src/KChart/Polar/KChartRingDiagram.cpp
--- a/src/KChart/Polar/KChartRingDiagram.cpp
+++ b/src/KChart/Polar/KChartRingDiagram.cpp
@@ -185,7 +185,7 @@
         if ( !d->expandWhenExploded ) {
             maxOffsetInThisRow -= qreal( i );
         }
-        totalOffset += qMax( maxOffsetInThisRow, 0.0 );
+        totalOffset += qMax<qreal>( maxOffsetInThisRow, 0.0 );
         // FIXME: What if explode factor of inner ring is > 1.0 ?
         //if ( !d->expandWhenExploded )
         //      break;
diff --git a/src/KChart/Ternary/KChartTernaryLineDiagram.cpp b/src/KChart/Ternary/KChartTernaryLineDiagram.cpp
--- a/src/KChart/Ternary/KChartTernaryLineDiagram.cpp
+++ b/src/KChart/Ternary/KChartTernaryLineDiagram.cpp
@@ -110,11 +110,11 @@
                 p->setBrush( brush( base ) );
 
                 // retrieve data
-                x = qMax( model()->data( model()->index( row, column, rootIndex() ) ).toReal(), // checked
+                x = qMax<qreal>( model()->data( model()->index( row, column, rootIndex() ) ).toReal(), // checked
                           0.0 );
-                y = qMax( model()->data( model()->index( row, column+1, rootIndex() ) ).toReal(), // checked
+                y = qMax<qreal>( model()->data( model()->index( row, column+1, rootIndex() ) ).toReal(), // checked
                           0.0 );
-                z = qMax( model()->data( model()->index( row, column+2, rootIndex() ) ).toReal(), // checked
+                z = qMax<qreal>( model()->data( model()->index( row, column+2, rootIndex() ) ).toReal(), // checked
                           0.0 );
 
                 qreal total = x + y + z;
diff --git a/src/KChart/Ternary/KChartTernaryPointDiagram.cpp b/src/KChart/Ternary/KChartTernaryPointDiagram.cpp
--- a/src/KChart/Ternary/KChartTernaryPointDiagram.cpp
+++ b/src/KChart/Ternary/KChartTernaryPointDiagram.cpp
@@ -98,11 +98,11 @@
                 p->setBrush( brush( base ) );
 
                 // retrieve data
-                x = qMax( model()->data( model()->index( row, column+0, rootIndex() ) ).toReal(), // checked
+                x = qMax<qreal>( model()->data( model()->index( row, column+0, rootIndex() ) ).toReal(), // checked
                           0.0 );
-                y = qMax( model()->data( model()->index( row, column+1, rootIndex() ) ).toReal(), // checked
+                y = qMax<qreal>( model()->data( model()->index( row, column+1, rootIndex() ) ).toReal(), // checked
                           0.0 );
-                z = qMax( model()->data( model()->index( row, column+2, rootIndex() ) ).toReal(), // checked
+                z = qMax<qreal>( model()->data( model()->index( row, column+2, rootIndex() ) ).toReal(), // checked
                           0.0 );
 
                 // fix messed up data values (paint as much as possible)
diff --git a/src/KGantt/kganttitemdelegate.cpp b/src/KGantt/kganttitemdelegate.cpp
--- a/src/KGantt/kganttitemdelegate.cpp
+++ b/src/KGantt/kganttitemdelegate.cpp
@@ -325,7 +325,7 @@
             QPainterPath path;
             const qreal deltaY = r.height()/2.;
             const qreal deltaXBezierControl = .25*qMin( r.width(), r.height() );
-            const qreal deltaX = qMin( r.width()/2., r.height() );
+            const qreal deltaX = qMin( r.width()/2, r.height() );
             path.moveTo( r.topLeft() );
             path.lineTo( r.topRight() );
             path.lineTo( QPointF( r.right(), r.top() + 2.*deltaY ) );