diff --git a/CHANGELOG.md b/CHANGELOG.md
index e3ba3de8..deeb00a6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,7 +14,7 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 ### Fixed
 
-- ...
+- Fix Chart samples by updating chart parameter from 0 to DataSeries::EMPTY_AS_GAP [#1448](https://github.com/PHPOffice/PhpSpreadsheet/pull/1448)
 
 ### Changed
 
diff --git a/samples/Chart/33_Chart_create_area.php b/samples/Chart/33_Chart_create_area.php
index 4478d2dd..860c16a6 100644
--- a/samples/Chart/33_Chart_create_area.php
+++ b/samples/Chart/33_Chart_create_area.php
@@ -83,7 +83,7 @@ $chart = new Chart(
     $legend, // legend
     $plotArea, // plotArea
     true, // plotVisibleOnly
-    0, // displayBlanksAs
+    DataSeries::EMPTY_AS_GAP, // displayBlanksAs
     null, // xAxisLabel
     $yAxisLabel  // yAxisLabel
 );
diff --git a/samples/Chart/33_Chart_create_bar_stacked.php b/samples/Chart/33_Chart_create_bar_stacked.php
index 7ba4d8de..0aa211a9 100644
--- a/samples/Chart/33_Chart_create_bar_stacked.php
+++ b/samples/Chart/33_Chart_create_bar_stacked.php
@@ -86,7 +86,7 @@ $chart = new Chart(
     $legend, // legend
     $plotArea, // plotArea
     true, // plotVisibleOnly
-    0, // displayBlanksAs
+    DataSeries::EMPTY_AS_GAP, // displayBlanksAs
     null, // xAxisLabel
     $yAxisLabel  // yAxisLabel
 );
diff --git a/samples/Chart/33_Chart_create_column.php b/samples/Chart/33_Chart_create_column.php
index 9ffe9d3f..694082a4 100644
--- a/samples/Chart/33_Chart_create_column.php
+++ b/samples/Chart/33_Chart_create_column.php
@@ -86,7 +86,7 @@ $chart = new Chart(
     $legend, // legend
     $plotArea, // plotArea
     true, // plotVisibleOnly
-    0, // displayBlanksAs
+    DataSeries::EMPTY_AS_GAP, // displayBlanksAs
     null, // xAxisLabel
     $yAxisLabel  // yAxisLabel
 );
diff --git a/samples/Chart/33_Chart_create_column_2.php b/samples/Chart/33_Chart_create_column_2.php
index bba9210a..f5a529b9 100644
--- a/samples/Chart/33_Chart_create_column_2.php
+++ b/samples/Chart/33_Chart_create_column_2.php
@@ -95,7 +95,7 @@ $chart = new Chart(
     $legend, // legend
     $plotArea, // plotArea
     true, // plotVisibleOnly
-    0, // displayBlanksAs
+    DataSeries::EMPTY_AS_GAP, // displayBlanksAs
     $xAxisLabel, // xAxisLabel
     $yAxisLabel  // yAxisLabel
 );
diff --git a/samples/Chart/33_Chart_create_composite.php b/samples/Chart/33_Chart_create_composite.php
index 83dc34a9..dfeacae3 100644
--- a/samples/Chart/33_Chart_create_composite.php
+++ b/samples/Chart/33_Chart_create_composite.php
@@ -139,7 +139,7 @@ $chart = new Chart(
     $legend, // legend
     $plotArea, // plotArea
     true, // plotVisibleOnly
-    0, // displayBlanksAs
+    DataSeries::EMPTY_AS_GAP, // displayBlanksAs
     null, // xAxisLabel
     null   // yAxisLabel
 );
diff --git a/samples/Chart/33_Chart_create_line.php b/samples/Chart/33_Chart_create_line.php
index bdaf0111..feae2f27 100644
--- a/samples/Chart/33_Chart_create_line.php
+++ b/samples/Chart/33_Chart_create_line.php
@@ -84,7 +84,7 @@ $chart = new Chart(
     $legend, // legend
     $plotArea, // plotArea
     true, // plotVisibleOnly
-    0, // displayBlanksAs
+    DataSeries::EMPTY_AS_GAP, // displayBlanksAs
     null, // xAxisLabel
     $yAxisLabel  // yAxisLabel
 );
diff --git a/samples/Chart/33_Chart_create_multiple_charts.php b/samples/Chart/33_Chart_create_multiple_charts.php
index 10a11e13..d0de5db4 100644
--- a/samples/Chart/33_Chart_create_multiple_charts.php
+++ b/samples/Chart/33_Chart_create_multiple_charts.php
@@ -158,7 +158,7 @@ $chart2 = new Chart(
     $legend2, // legend
     $plotArea2, // plotArea
     true, // plotVisibleOnly
-    0, // displayBlanksAs
+    DataSeries::EMPTY_AS_GAP, // displayBlanksAs
     null, // xAxisLabel
     $yAxisLabel2 // yAxisLabel
 );
diff --git a/samples/Chart/33_Chart_create_pie.php b/samples/Chart/33_Chart_create_pie.php
index d4ec0752..54d5916b 100644
--- a/samples/Chart/33_Chart_create_pie.php
+++ b/samples/Chart/33_Chart_create_pie.php
@@ -84,7 +84,7 @@ $chart1 = new Chart(
     $legend1, // legend
     $plotArea1, // plotArea
     true, // plotVisibleOnly
-    0, // displayBlanksAs
+    DataSeries::EMPTY_AS_GAP, // displayBlanksAs
     null, // xAxisLabel
     null   // yAxisLabel - Pie charts don't have a Y-Axis
 );
diff --git a/samples/Chart/33_Chart_create_pie_custom_colors.php b/samples/Chart/33_Chart_create_pie_custom_colors.php
index 727a0cde..0e9ce4b7 100644
--- a/samples/Chart/33_Chart_create_pie_custom_colors.php
+++ b/samples/Chart/33_Chart_create_pie_custom_colors.php
@@ -162,7 +162,7 @@ $chart2 = new Chart(
     null, // legend
     $plotArea2, // plotArea
     true, // plotVisibleOnly
-    0, // displayBlanksAs
+    DataSeries::EMPTY_AS_GAP, // displayBlanksAs
     null, // xAxisLabel
     null   // yAxisLabel - Like Pie charts, Donut charts don't have a Y-Axis
 );
diff --git a/samples/Chart/33_Chart_create_radar.php b/samples/Chart/33_Chart_create_radar.php
index e57914ab..1c5c435f 100644
--- a/samples/Chart/33_Chart_create_radar.php
+++ b/samples/Chart/33_Chart_create_radar.php
@@ -96,7 +96,7 @@ $chart = new Chart(
     $legend, // legend
     $plotArea, // plotArea
     true, // plotVisibleOnly
-    0, // displayBlanksAs
+    DataSeries::EMPTY_AS_GAP, // displayBlanksAs
     null, // xAxisLabel
     null   // yAxisLabel - Radar charts don't have a Y-Axis
 );
diff --git a/samples/Chart/33_Chart_create_scatter.php b/samples/Chart/33_Chart_create_scatter.php
index 12fc2bdc..02fa866d 100644
--- a/samples/Chart/33_Chart_create_scatter.php
+++ b/samples/Chart/33_Chart_create_scatter.php
@@ -80,7 +80,7 @@ $chart = new Chart(
     $legend, // legend
     $plotArea, // plotArea
     true, // plotVisibleOnly
-    0, // displayBlanksAs
+    DataSeries::EMPTY_AS_GAP, // displayBlanksAs
     null, // xAxisLabel
     $yAxisLabel  // yAxisLabel
 );
diff --git a/samples/Chart/33_Chart_create_stock.php b/samples/Chart/33_Chart_create_stock.php
index 7a9f7274..4e8ffe8e 100644
--- a/samples/Chart/33_Chart_create_stock.php
+++ b/samples/Chart/33_Chart_create_stock.php
@@ -92,7 +92,7 @@ $chart = new Chart(
     $legend, // legend
     $plotArea, // plotArea
     true, // plotVisibleOnly
-    0, // displayBlanksAs
+    DataSeries::EMPTY_AS_GAP, // displayBlanksAs
     $xAxisLabel, // xAxisLabel
     $yAxisLabel  // yAxisLabel
 );
diff --git a/src/PhpSpreadsheet/Chart/Chart.php b/src/PhpSpreadsheet/Chart/Chart.php
index 59c9ed5d..bc42c854 100644
--- a/src/PhpSpreadsheet/Chart/Chart.php
+++ b/src/PhpSpreadsheet/Chart/Chart.php
@@ -156,7 +156,7 @@ class Chart
      * @param null|GridLines $majorGridlines
      * @param null|GridLines $minorGridlines
      */
-    public function __construct($name, Title $title = null, Legend $legend = null, PlotArea $plotArea = null, $plotVisibleOnly = true, $displayBlanksAs = 'gap', Title $xAxisLabel = null, Title $yAxisLabel = null, Axis $xAxis = null, Axis $yAxis = null, GridLines $majorGridlines = null, GridLines $minorGridlines = null)
+    public function __construct($name, Title $title = null, Legend $legend = null, PlotArea $plotArea = null, $plotVisibleOnly = true, $displayBlanksAs = DataSeries::EMPTY_AS_GAP, Title $xAxisLabel = null, Title $yAxisLabel = null, Axis $xAxis = null, Axis $yAxis = null, GridLines $majorGridlines = null, GridLines $minorGridlines = null)
     {
         $this->name = $name;
         $this->title = $title;
diff --git a/src/PhpSpreadsheet/Chart/DataSeries.php b/src/PhpSpreadsheet/Chart/DataSeries.php
index c20efabe..79f4e8d1 100644
--- a/src/PhpSpreadsheet/Chart/DataSeries.php
+++ b/src/PhpSpreadsheet/Chart/DataSeries.php
@@ -40,6 +40,10 @@ class DataSeries
     const STYLE_MARKER = 'marker';
     const STYLE_FILLED = 'filled';
 
+    const EMPTY_AS_GAP = 'gap';
+    const EMPTY_AS_ZERO = 'zero';
+    const EMPTY_AS_SPAN = 'span';
+
     /**
      * Series Plot Type.
      *