2 files changed, 17 insertions, 1 deletions
diff --git a/poi-ooxml/src/main/java/org/apache/poi/xwpf/usermodel/XWPFDocument.java b/poi-ooxml/src/main/java/org/apache/poi/xwpf/usermodel/XWPFDocument.java
index af3a4d7beb..6ab0ae9907 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/xwpf/usermodel/XWPFDocument.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/xwpf/usermodel/XWPFDocument.java
@@ -842,7 +842,7 @@ public class XWPFDocument extends POIXMLDocument implements Document, IBody {
             cursor.toCursor(newParaPos);
             while (cursor.toPrevSibling()) {
                 o = cursor.getObject();
-                if (o instanceof CTP || o instanceof CTTbl) {
+                if (o instanceof CTP || o instanceof CTTbl || o instanceof CTSdtBlock) {
                     i++;
                 }
             }
diff --git a/poi-ooxml/src/test/java/org/apache/poi/xwpf/usermodel/TestXWPFDocument.java b/poi-ooxml/src/test/java/org/apache/poi/xwpf/usermodel/TestXWPFDocument.java
index 9756291e86..fe67289913 100644
--- a/poi-ooxml/src/test/java/org/apache/poi/xwpf/usermodel/TestXWPFDocument.java
+++ b/poi-ooxml/src/test/java/org/apache/poi/xwpf/usermodel/TestXWPFDocument.java
@@ -465,6 +465,22 @@ public final class TestXWPFDocument {
     }
 
     @Test
+    void testInsertNewParagraphWithSdt() throws IOException {
+        try (XWPFDocument doc = new XWPFDocument()) {
+            doc.createTOC();
+            doc.createParagraph();
+            try (XWPFDocument docx = XWPFTestDataSamples.writeOutAndReadBack(doc)) {
+                XWPFParagraph paragraph = docx.getParagraphArray(0);
+                XmlCursor xmlCursor = paragraph.getCTP().newCursor();
+                XWPFParagraph insertNewParagraph = docx.insertNewParagraph(xmlCursor);
+
+                assertEquals(insertNewParagraph, docx.getParagraphs().get(0));
+                assertEquals(insertNewParagraph, docx.getBodyElements().get(1));
+            }
+        }
+    }
+
+    @Test
     @Disabled("XWPF should be able to write to a new Stream when opened Read-Only")
     void testWriteFromReadOnlyOPC() throws Exception {
         try (OPCPackage opc = OPCPackage.open(