diff --git a/src/xlsx/xlsxformat.cpp b/src/xlsx/xlsxformat.cpp
index 9e4acda..8d81c70 100755
--- a/src/xlsx/xlsxformat.cpp
+++ b/src/xlsx/xlsxformat.cpp
@@ -33,9 +33,9 @@ QT_BEGIN_NAMESPACE_XLSX
 
 FormatPrivate::FormatPrivate()
     : dirty(true)
-    , font_dirty(true), font_index_valid(false), font_index(-1)
-    , fill_dirty(true), fill_index_valid(false), fill_index(-1)
-    , border_dirty(true), border_index_valid(false), border_index(-1)
+    , font_dirty(true), font_index_valid(false), font_index(0)
+    , fill_dirty(true), fill_index_valid(false), fill_index(0)
+    , border_dirty(true), border_index_valid(false), border_index(0)
     , xf_index(-1), xf_indexValid(false)
     , is_dxf_fomat(false), dxf_index(-1), dxf_indexValid(false)
     , theme(0)
@@ -215,7 +215,7 @@ Format::~Format()
  */
 int Format::numberFormatIndex() const
 {
-    return intProperty(FormatPrivate::P_NumFmt_Id);
+    return intProperty(FormatPrivate::P_NumFmt_Id, 0);
 }
 
 /*!
@@ -477,7 +477,7 @@ int Format::fontIndex() const
     if (fontIndexValid())
         return d->font_index;
 
-    return -1;
+    return 0;
 }
 
 /*!
@@ -884,7 +884,9 @@ bool Format::borderIndexValid() const
 */
 int Format::borderIndex() const
 {
-    return d->border_index;
+    if (borderIndexValid())
+        return d->border_index;
+    return 0;
 }
 
 /*!
@@ -893,6 +895,7 @@ int Format::borderIndex() const
 void Format::setBorderIndex(int index)
 {
     d->border_index = index;
+    d->border_index_valid = true;
 }
 
 /*! \internal
@@ -1000,9 +1003,9 @@ bool Format::fillIndexValid() const
  */
 int Format::fillIndex() const
 {
-    if (!d)
-        return 0;
-    return d->fill_index;
+    if (fillIndexValid())
+        return d->fill_index;
+    return 0;
 }
 
 /*!
@@ -1011,6 +1014,7 @@ int Format::fillIndex() const
 void Format::setFillIndex(int index)
 {
     d->fill_index = index;
+    d->fill_index_valid = true;
 }
 
 /*!
diff --git a/src/xlsx/xlsxstyles.cpp b/src/xlsx/xlsxstyles.cpp
index 836d0c1..d0a1f31 100755
--- a/src/xlsx/xlsxstyles.cpp
+++ b/src/xlsx/xlsxstyles.cpp
@@ -571,14 +571,10 @@ void Styles::writeCellXfs(QXmlStreamWriter &writer)
     foreach (const Format &format, m_xf_formatsList) {
         int xf_id = 0;
         writer.writeStartElement(QStringLiteral("xf"));
-        if (format.hasNumFmtData())
-            writer.writeAttribute(QStringLiteral("numFmtId"), QString::number(format.numberFormatIndex()));
-        if (format.hasFontData())
-            writer.writeAttribute(QStringLiteral("fontId"), QString::number(format.fontIndex()));
-        if (format.hasFillData())
-            writer.writeAttribute(QStringLiteral("fillId"), QString::number(format.fillIndex()));
-        if (format.hasBorderData())
-            writer.writeAttribute(QStringLiteral("borderId"), QString::number(format.borderIndex()));
+        writer.writeAttribute(QStringLiteral("numFmtId"), QString::number(format.numberFormatIndex()));
+        writer.writeAttribute(QStringLiteral("fontId"), QString::number(format.fontIndex()));
+        writer.writeAttribute(QStringLiteral("fillId"), QString::number(format.fillIndex()));
+        writer.writeAttribute(QStringLiteral("borderId"), QString::number(format.borderIndex()));
         writer.writeAttribute(QStringLiteral("xfId"), QString::number(xf_id));
         if (format.hasNumFmtData())
             writer.writeAttribute(QStringLiteral("applyNumberFormat"), QStringLiteral("1"));
diff --git a/tests/auto/styles/tst_stylestest.cpp b/tests/auto/styles/tst_stylestest.cpp
index 170e0f8..ae49317 100644
--- a/tests/auto/styles/tst_stylestest.cpp
+++ b/tests/auto/styles/tst_stylestest.cpp
@@ -35,8 +35,7 @@ void StylesTest::testEmptyStyle()
     QXlsx::Styles styles;
     QByteArray xmlData = styles.saveToXmlData();
 
-//    QVERIFY2(xmlData.contains("<cellXfs count=\"1\"><xf numFmtId=\"0\" fontId=\"0\" fillId=\"0\" borderId=\"0\" xfId=\"0\"/></cellXfs>"), "Must have one cell style");
-    QVERIFY2(xmlData.contains("<cellXfs count=\"1\"><xf xfId=\"0\"/></cellXfs>"), "Must have one cell style");
+    QVERIFY2(xmlData.contains("<cellXfs count=\"1\"><xf numFmtId=\"0\" fontId=\"0\" fillId=\"0\" borderId=\"0\" xfId=\"0\"/></cellXfs>"), "Must have one cell style");
     QVERIFY2(xmlData.contains("<border><left/><right/><top/><bottom/><diagonal/></border>"), "Excel don't simply generate <border/>, through it works");
 }