diff --git a/src/PhpSpreadsheet/Chart/Renderer/JpGraph.php b/src/PhpSpreadsheet/Chart/Renderer/JpGraph.php
index b6034b2c..c0445d49 100644
--- a/src/PhpSpreadsheet/Chart/Renderer/JpGraph.php
+++ b/src/PhpSpreadsheet/Chart/Renderer/JpGraph.php
@@ -401,7 +401,7 @@ class JpGraph implements IRenderer
             $seriesPlots[] = $seriesPlot;
         }
         //    Reverse the plot order for bar rather than column chart
-        if (($rotation == 'bar') && (!($grouping == 'percentStacked'))) {
+        if (($rotation == 'bar') && ($grouping != 'percentStacked')) {
             $seriesPlots = array_reverse($seriesPlots);
         }
 
diff --git a/src/PhpSpreadsheet/Document/Properties.php b/src/PhpSpreadsheet/Document/Properties.php
index b7610206..bbac96d9 100644
--- a/src/PhpSpreadsheet/Document/Properties.php
+++ b/src/PhpSpreadsheet/Document/Properties.php
@@ -543,7 +543,7 @@ class Properties
 
                 break;
             case 'bool':     //    Boolean
-                return ($propertyValue == 'true') ? true : false;
+                return $propertyValue == 'true';
 
                 break;
             case 'cy':       //    Currency