1 files changed, 5 insertions, 0 deletions
diff --git a/poi-ooxml/src/main/java/org/apache/poi/xdgf/usermodel/section/geometry/Ellipse.java b/poi-ooxml/src/main/java/org/apache/poi/xdgf/usermodel/section/geometry/Ellipse.java
index 703a24b499..ce63d9fc11 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/xdgf/usermodel/section/geometry/Ellipse.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/xdgf/usermodel/section/geometry/Ellipse.java
@@ -59,6 +59,11 @@ public class Ellipse implements GeometryRow {
         for (CellType cell : row.getCellArray()) {
             String cellName = cell.getN();
 
+            if (cellName == null) {
+                throw new POIXMLException("Invalid cell '" + cellName
+                        + "' in Ellipse row");
+            }
+
             switch (cellName) {
                 case "X":
                     x = XDGFCell.parseDoubleValue(cell);