From b184fc6fa7b1c44d81d6d0a300507fbde3433b70 Mon Sep 17 00:00:00 2001
From: Tilman Hausherr <tilman@apache.org>
Date: Sun, 7 Jul 2024 13:22:58 +0000
Subject: [PATCH] PDFBOX-5660: use convenience method

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1918988 13f79535-47bb-0310-9956-ffa450edef68
---
 .../src/main/java/org/apache/pdfbox/pdmodel/PDDocument.java  | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/PDDocument.java b/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/PDDocument.java
index 2d681467de7..f78c5b3cb52 100644
--- a/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/PDDocument.java
+++ b/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/PDDocument.java
@@ -367,10 +367,9 @@ public void addSignature(PDSignature sigObject, SignatureInterface signatureInte
         }
 
         PDSignatureField signatureField = null;
-        COSBase cosFieldBase = acroForm.getCOSObject().getDictionaryObject(COSName.FIELDS);
-        if (cosFieldBase instanceof COSArray)
+        COSArray fieldArray = acroForm.getCOSObject().getCOSArray(COSName.FIELDS);
+        if (fieldArray != null)
         {
-            COSArray fieldArray = (COSArray) cosFieldBase;
             fieldArray.setNeedToBeUpdated(true);
             signatureField = findSignatureField(acroForm.getFieldIterator(), sigObject);
         }