diff --git a/poi-ooxml/src/main/java/org/apache/poi/xddf/usermodel/chart/XDDFChartData.java b/poi-ooxml/src/main/java/org/apache/poi/xddf/usermodel/chart/XDDFChartData.java
index e93cd01e1d..3074f4f486 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/xddf/usermodel/chart/XDDFChartData.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/xddf/usermodel/chart/XDDFChartData.java
@@ -167,7 +167,7 @@ public abstract class XDDFChartData {
                 int numOfPoints = category.getPointCount();
                 if (numOfPoints != values.getPointCount()) {
                     throw new IllegalStateException("Category and values must have the same point count, but had " +
-							numOfPoints + " categories and " + values.getPointCount() + " values.");
+                            numOfPoints + " categories and " + values.getPointCount() + " values.");
                 }
             }
             this.categoryData = category;
diff --git a/poi-ooxml/src/main/java/org/apache/poi/xddf/usermodel/chart/XDDFDataSourcesFactory.java b/poi-ooxml/src/main/java/org/apache/poi/xddf/usermodel/chart/XDDFDataSourcesFactory.java
index db5dda65b3..722628b12d 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/xddf/usermodel/chart/XDDFDataSourcesFactory.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/xddf/usermodel/chart/XDDFDataSourcesFactory.java
@@ -72,10 +72,10 @@ public class XDDFDataSourcesFactory {
 
                 @Override
                 public String getPointAt(int index) {
-					if (category.getPtArray().length <= index) {
-						throw new IllegalArgumentException("Cannot access 0-based index " + index +
-								" in point-array with " + category.getPtArray().length + " items");
-					}
+                    if (category.getPtArray().length <= index) {
+                        throw new IllegalArgumentException("Cannot access 0-based index " + index +
+                                " in point-array with " + category.getPtArray().length + " items");
+                    }
                     return category.getPtArray(index).getV();
                 }