diff --git a/svgio/qa/cppunit/SvgImportTest.cxx b/svgio/qa/cppunit/SvgImportTest.cxx
index f918a1527946..50a7ef7231f2 100644
--- a/svgio/qa/cppunit/SvgImportTest.cxx
+++ b/svgio/qa/cppunit/SvgImportTest.cxx
@@ -44,6 +44,7 @@ class Test : public test::BootstrapFixture, public XmlTestTools
     void testFontsizePercentage();
     void testTdf45771();
     void testTdf85770();
+    void testTdf79163();
 
     Primitive2DSequence parseSvg(const char* aSource);
 
@@ -58,6 +59,7 @@ public:
     CPPUNIT_TEST(testFontsizePercentage);
     CPPUNIT_TEST(testTdf45771);
     CPPUNIT_TEST(testTdf85770);
+    CPPUNIT_TEST(testTdf79163);
     CPPUNIT_TEST_SUITE_END();
 };
 
@@ -221,6 +223,20 @@ void Test::testTdf85770()
     assertXPath(pDocument, "/primitive2D/transform/textsimpleportion[2]", "text", "Start ");
     assertXPath(pDocument, "/primitive2D/transform/textsimpleportion[3]", "text", "End");
 }
+
+void Test::testTdf79163()
+{
+    Primitive2DSequence aSequenceTdf79163 = parseSvg("/svgio/qa/cppunit/data/tdf79163.svg");
+    CPPUNIT_ASSERT_EQUAL(1, (int)aSequenceTdf79163.getLength());
+
+    Primitive2dXmlDump dumper;
+    xmlDocPtr pDocument = dumper.dumpAndParse(comphelper::sequenceToContainer<Primitive2DContainer>(aSequenceTdf79163));
+
+    CPPUNIT_ASSERT (pDocument);
+
+    assertXPath(pDocument, "/primitive2D/transform/mask/unifiedtransparence", "transparence", "0");
+}
+
 CPPUNIT_TEST_SUITE_REGISTRATION(Test);
 
 }
diff --git a/svgio/qa/cppunit/data/tdf79163.svg b/svgio/qa/cppunit/data/tdf79163.svg
new file mode 100644
index 000000000000..0153037236c2
--- /dev/null
+++ b/svgio/qa/cppunit/data/tdf79163.svg
@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+    xmlns:xlink="http://www.w3.org/1999/xlink">
+
+    <rect x="50" y="50" height="110" width="110"
+          style="fill: #ccccff" opacity="0.5"
+            >
+    </rect>
+</svg>
diff --git a/test/source/primitive2dxmldump.cxx b/test/source/primitive2dxmldump.cxx
index 48fa0d0d2b72..84cef39aa822 100644
--- a/test/source/primitive2dxmldump.cxx
+++ b/test/source/primitive2dxmldump.cxx
@@ -22,6 +22,8 @@
 #include <drawinglayer/primitive2d/hiddengeometryprimitive2d.hxx>
 #include <drawinglayer/primitive2d/polygonprimitive2d.hxx>
 #include <drawinglayer/primitive2d/textprimitive2d.hxx>
+#include <drawinglayer/primitive2d/maskprimitive2d.hxx>
+#include <drawinglayer/primitive2d/unifiedtransparenceprimitive2d.hxx>
 
 #include <drawinglayer/attribute/lineattribute.hxx>
 
@@ -184,6 +186,27 @@ void Primitive2dXmlDump::decomposeAndWrite(
             }
             break;
 
+            case PRIMITIVE2D_ID_MASKPRIMITIVE2D:
+            {
+                const MaskPrimitive2D* pMaskPrimitive2D = dynamic_cast<const MaskPrimitive2D*>(pBasePrimitive);
+                rWriter.startElement("mask");
+
+                decomposeAndWrite(pMaskPrimitive2D->getChildren(), rWriter);
+                rWriter.endElement();
+            }
+            break;
+
+            case PRIMITIVE2D_ID_UNIFIEDTRANSPARENCEPRIMITIVE2D:
+            {
+                const UnifiedTransparencePrimitive2D* pUnifiedTransparencePrimitive2D = dynamic_cast<const UnifiedTransparencePrimitive2D*>(pBasePrimitive);
+                rWriter.startElement("unifiedtransparence");
+
+                rWriter.attribute("transparence", pUnifiedTransparencePrimitive2D->getTransparence());
+
+                rWriter.endElement();
+            }
+            break;
+
             default:
             {
                 rWriter.element(OUStringToOString(sCurrentElementTag, RTL_TEXTENCODING_UTF8));