diff --git a/sw/source/core/text/EnhancedPDFExportHelper.cxx b/sw/source/core/text/EnhancedPDFExportHelper.cxx
index 6f8dae771534..f4edc4482352 100644
--- a/sw/source/core/text/EnhancedPDFExportHelper.cxx
+++ b/sw/source/core/text/EnhancedPDFExportHelper.cxx
@@ -224,7 +224,7 @@ constexpr OUString aLinkString = u"Link"_ustr;
 constexpr OUStringLiteral aNoteString = u"Note";
 constexpr OUStringLiteral aAnnotString = u"Annot";
 
-// returns true if first paragraph in cell frame has 'table heading' style
+// returns true if first paragraph in cell frame has 'table heading' style, or one derived from it
 bool lcl_IsHeadlineCell( const SwCellFrame& rCellFrame )
 {
     bool bRet = false;
@@ -233,11 +233,14 @@ bool lcl_IsHeadlineCell( const SwCellFrame& rCellFrame )
     if ( pCnt && pCnt->IsTextFrame() )
     {
         SwTextNode const*const pTextNode = static_cast<const SwTextFrame*>(pCnt)->GetTextNodeForParaProps();
-        const SwFormat* pTextFormat = pTextNode->GetFormatColl();
-
-        ProgName sStyleName;
-        SwStyleNameMapper::FillProgName( pTextFormat->GetName(), sStyleName, SwGetPoolIdFromName::TxtColl );
-        bRet = sStyleName.toString() == aTableHeadingName;
+        for (const SwFormat* pFormat = pTextNode->GetFormatColl(); pFormat && !bRet;
+             pFormat = pFormat->DerivedFrom())
+        {
+            ProgName sStyleName;
+            SwStyleNameMapper::FillProgName(pFormat->GetName(), sStyleName,
+                                            SwGetPoolIdFromName::TxtColl);
+            bRet = sStyleName == aTableHeadingName;
+        }
     }
 
     // tdf#153935 wild guessing for 1st row based on table autoformat
diff --git a/vcl/qa/cppunit/pdfexport/data/TableHeadingDerived.fodt b/vcl/qa/cppunit/pdfexport/data/TableHeadingDerived.fodt
new file mode 100644
index 000000000000..68d0fc923000
--- /dev/null
+++ b/vcl/qa/cppunit/pdfexport/data/TableHeadingDerived.fodt
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<office:document xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:style="urn:oasis:names:tc:opendocument:xmlns:style:1.0" xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" xmlns:table="urn:oasis:names:tc:opendocument:xmlns:table:1.0" xmlns:fo="urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0" xmlns:svg="urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0" xmlns:dc="http://purl.org/dc/elements/1.1/" office:version="1.3" office:mimetype="application/vnd.oasis.opendocument.text">
+ <office:meta><dc:title>Table heading style and one derived from it</dc:title></office:meta>
+ <office:font-face-decls>
+  <style:font-face style:name="Liberation Serif" svg:font-family="'Liberation Serif'" style:font-family-generic="roman" style:font-pitch="variable"/>
+ </office:font-face-decls>
+ <office:styles>
+  <style:default-style style:family="paragraph">
+   <style:text-properties style:font-name="Liberation Serif" fo:font-size="12pt" fo:language="en" fo:country="US" style:font-name-asian="Liberation Serif" style:font-size-asian="12pt" style:font-name-complex="Liberation Serif" style:font-size-complex="12pt"/>
+  </style:default-style>
+  <style:style style:name="Standard" style:family="paragraph" style:class="text"/>
+  <style:style style:name="Table_20_Contents" style:display-name="Table Contents" style:family="paragraph" style:parent-style-name="Standard" style:class="extra"/>
+  <style:style style:name="Table_20_Heading" style:display-name="Table Heading" style:family="paragraph" style:parent-style-name="Table_20_Contents" style:class="extra">
+   <style:text-properties fo:font-weight="bold"/>
+  </style:style>
+  <style:style style:name="CustomTH" style:family="paragraph" style:parent-style-name="Table_20_Heading"/>
+ </office:styles>
+ <office:automatic-styles>
+  <style:page-layout style:name="pm1">
+   <style:page-layout-properties fo:page-width="21cm" fo:page-height="29.7cm" style:print-orientation="portrait" fo:margin-top="2cm" fo:margin-bottom="2cm" fo:margin-left="2cm" fo:margin-right="2cm" style:writing-mode="lr-tb"/>
+  </style:page-layout>
+ </office:automatic-styles>
+ <office:master-styles>
+  <style:master-page style:name="Standard" style:page-layout-name="pm1"/>
+ </office:master-styles>
+ <office:body>
+  <office:text>
+   <table:table table:name="Table1">
+    <table:table-column table:number-columns-repeated="2"/>
+    <table:table-row>
+     <table:table-cell office:value-type="string"><text:p text:style-name="Table_20_Heading">head</text:p></table:table-cell>
+     <table:table-cell office:value-type="string"><text:p text:style-name="Table_20_Contents">one</text:p></table:table-cell>
+    </table:table-row>
+    <table:table-row>
+     <table:table-cell office:value-type="string"><text:p text:style-name="CustomTH">derived</text:p></table:table-cell>
+     <table:table-cell office:value-type="string"><text:p text:style-name="Table_20_Contents">two</text:p></table:table-cell>
+    </table:table-row>
+   </table:table>
+  </office:text>
+ </office:body>
+</office:document>
diff --git a/vcl/qa/cppunit/pdfexport/pdfexport2.cxx b/vcl/qa/cppunit/pdfexport/pdfexport2.cxx
index 43a41584acb0..11498d9d1cc1 100644
--- a/vcl/qa/cppunit/pdfexport/pdfexport2.cxx
+++ b/vcl/qa/cppunit/pdfexport/pdfexport2.cxx
@@ -2181,6 +2181,70 @@ CPPUNIT_TEST_FIXTURE(PdfExportTest2, testTdf149140)
     CPPUNIT_ASSERT_EQUAL(6, nTH);
 }
 
+// the structure element type of a table cell that a row's kid refers to
+OString GetCellType(vcl::filter::PDFElement* pElement)
+{
+    auto pRef = dynamic_cast<vcl::filter::PDFReferenceElement*>(pElement);
+    CPPUNIT_ASSERT(pRef);
+    auto pCell = pRef->LookupObject();
+    CPPUNIT_ASSERT(pCell);
+    auto pS = dynamic_cast<vcl::filter::PDFNameElement*>(pCell->Lookup("S"_ostr));
+    CPPUNIT_ASSERT(pS);
+    return pS->GetValue();
+}
+
+CPPUNIT_TEST_FIXTURE(PdfExportTest2, testTdf173194)
+{
+    loadFromFile(u"TableHeadingDerived.fodt");
+
+    uno::Sequence aFilterData{ comphelper::makePropertyValue(u"PDFUACompliance"_ustr, true) };
+    save(TestFilter::PDF_WRITER,
+         { comphelper::makePropertyValue(u"FilterData"_ustr, aFilterData) });
+
+    SvFileStream aStream(maTempFile.GetURL(), StreamMode::READ);
+    vcl::filter::PDFDocument aDocument;
+    CPPUNIT_ASSERT(aDocument.Read(aStream));
+
+    vcl::filter::PDFObjectElement* pTableSE(nullptr);
+    for (const auto& rDocElement : aDocument.GetElements())
+    {
+        auto pObject = dynamic_cast<vcl::filter::PDFObjectElement*>(rDocElement.get());
+        if (!pObject)
+            continue;
+        auto pType = dynamic_cast<vcl::filter::PDFNameElement*>(pObject->Lookup("Type"_ostr));
+        auto pS = dynamic_cast<vcl::filter::PDFNameElement*>(pObject->Lookup("S"_ostr));
+        if (pType && pType->GetValue() == "StructElem" && pS && pS->GetValue() == "Table")
+        {
+            CPPUNIT_ASSERT(!pTableSE);
+            pTableSE = pObject;
+        }
+    }
+    CPPUNIT_ASSERT(pTableSE);
+
+    auto pRows = dynamic_cast<vcl::filter::PDFArrayElement*>(pTableSE->Lookup("K"_ostr));
+    CPPUNIT_ASSERT(pRows);
+    CPPUNIT_ASSERT_EQUAL(size_t(2), pRows->GetElements().size());
+
+    // the first column is Table Heading in row one and a style derived from it in row two,
+    // so both rows read TH then TD
+    for (const auto pRowElement : pRows->GetElements())
+    {
+        auto pRowRef = dynamic_cast<vcl::filter::PDFReferenceElement*>(pRowElement);
+        CPPUNIT_ASSERT(pRowRef);
+        auto pRow = pRowRef->LookupObject();
+        CPPUNIT_ASSERT(pRow);
+        auto pRowS = dynamic_cast<vcl::filter::PDFNameElement*>(pRow->Lookup("S"_ostr));
+        CPPUNIT_ASSERT(pRowS);
+        CPPUNIT_ASSERT_EQUAL("TR"_ostr, pRowS->GetValue());
+
+        auto pCells = dynamic_cast<vcl::filter::PDFArrayElement*>(pRow->Lookup("K"_ostr));
+        CPPUNIT_ASSERT(pCells);
+        CPPUNIT_ASSERT_EQUAL(size_t(2), pCells->GetElements().size());
+        CPPUNIT_ASSERT_EQUAL("TH"_ostr, GetCellType(pCells->GetElement(0)));
+        CPPUNIT_ASSERT_EQUAL("TD"_ostr, GetCellType(pCells->GetElement(1)));
+    }
+}
+
 CPPUNIT_TEST_FIXTURE(PdfExportTest2, testTdf153935)
 {
     // tdf#153935: PDF/A-1 + PDF/UA must still emit /Scope on TH and /Tabs on