diff --git a/samples/resources/Sample_11_ReadWord2007.docx b/samples/resources/Sample_11_ReadWord2007.docx
index 406cf1e1..f6526360 100644
Binary files a/samples/resources/Sample_11_ReadWord2007.docx and b/samples/resources/Sample_11_ReadWord2007.docx differ
diff --git a/src/PhpWord/Style/Font.php b/src/PhpWord/Style/Font.php
index 018604d3..09e6f1a2 100644
--- a/src/PhpWord/Style/Font.php
+++ b/src/PhpWord/Style/Font.php
@@ -122,14 +122,14 @@ class Font extends AbstractStyle
      *
      * @var bool
      */
-    private $bold = false;
+    private $bold;
 
     /**
      * Italic
      *
      * @var bool
      */
-    private $italic = false;
+    private $italic;
 
     /**
      * Undeline
@@ -157,14 +157,14 @@ class Font extends AbstractStyle
      *
      * @var bool
      */
-    private $strikethrough = false;
+    private $strikethrough;
 
     /**
      * Double strikethrough
      *
      * @var bool
      */
-    private $doubleStrikethrough = false;
+    private $doubleStrikethrough;
 
     /**
      * Small caps
@@ -172,7 +172,7 @@ class Font extends AbstractStyle
      * @var bool
      * @see  http://www.schemacentral.com/sc/ooxml/e-w_smallCaps-1.html
      */
-    private $smallCaps = false;
+    private $smallCaps;
 
     /**
      * All caps
@@ -180,7 +180,7 @@ class Font extends AbstractStyle
      * @var bool
      * @see  http://www.schemacentral.com/sc/ooxml/e-w_caps-1.html
      */
-    private $allCaps = false;
+    private $allCaps;
 
     /**
      * Foreground/highlight
@@ -235,7 +235,7 @@ class Font extends AbstractStyle
      *
      * @var bool
      */
-    private $rtl = false;
+    private $rtl;
 
     /**
      * noProof (disables AutoCorrect)
@@ -243,7 +243,7 @@ class Font extends AbstractStyle
      * @var bool
      * http://www.datypic.com/sc/ooxml/e-w_noProof-1.html
      */
-    private $noProof = false;
+    private $noProof;
 
     /**
      * Languages
@@ -258,7 +258,7 @@ class Font extends AbstractStyle
      * @var bool
      * @see  http://www.datypic.com/sc/ooxml/e-w_vanish-1.html
      */
-    private $hidden = false;
+    private $hidden;
 
     /**
      * Vertically Raised or Lowered Text
diff --git a/src/PhpWord/Writer/Word2007/Style/AbstractStyle.php b/src/PhpWord/Writer/Word2007/Style/AbstractStyle.php
index 3236cead..fcd4aeb6 100644
--- a/src/PhpWord/Writer/Word2007/Style/AbstractStyle.php
+++ b/src/PhpWord/Writer/Word2007/Style/AbstractStyle.php
@@ -121,6 +121,21 @@ abstract class AbstractStyle
         }
     }
 
+    /**
+     * Writes boolean as 0 or 1
+     *
+     * @param bool $value
+     * @return null|string
+     */
+    protected function writeOnOf($value = null)
+    {
+        if ($value === null) {
+            return null;
+        }
+
+        return $value ? '1' : '0';
+    }
+
     /**
      * Assemble style array into style string
      *
diff --git a/src/PhpWord/Writer/Word2007/Style/Font.php b/src/PhpWord/Writer/Word2007/Style/Font.php
index f299d8ef..dd4fac4f 100644
--- a/src/PhpWord/Writer/Word2007/Style/Font.php
+++ b/src/PhpWord/Writer/Word2007/Style/Font.php
@@ -107,21 +107,21 @@ class Font extends AbstractStyle
         $xmlWriter->writeElementIf($size !== null, 'w:szCs', 'w:val', $size * 2);
 
         // Bold, italic
-        $xmlWriter->writeElementIf($style->isBold(), 'w:b');
-        $xmlWriter->writeElementIf($style->isBold(), 'w:bCs');
-        $xmlWriter->writeElementIf($style->isItalic(), 'w:i');
-        $xmlWriter->writeElementIf($style->isItalic(), 'w:iCs');
+        $xmlWriter->writeElementIf($style->isBold() !== null, 'w:b', 'w:val', $this->writeOnOf($style->isBold()));
+        $xmlWriter->writeElementIf($style->isBold() !== null, 'w:bCs', 'w:val', $this->writeOnOf($style->isBold()));
+        $xmlWriter->writeElementIf($style->isItalic() !== null, 'w:i', 'w:val', $this->writeOnOf($style->isItalic()));
+        $xmlWriter->writeElementIf($style->isItalic() !== null, 'w:iCs', 'w:val', $this->writeOnOf($style->isItalic()));
 
         // Strikethrough, double strikethrough
-        $xmlWriter->writeElementIf($style->isStrikethrough(), 'w:strike');
-        $xmlWriter->writeElementIf($style->isDoubleStrikethrough(), 'w:dstrike');
+        $xmlWriter->writeElementIf($style->isStrikethrough() !== null, 'w:strike', 'w:val', $this->writeOnOf($style->isStrikethrough()));
+        $xmlWriter->writeElementIf($style->isDoubleStrikethrough() !== null, 'w:dstrike', 'w:val', $this->writeOnOf($style->isDoubleStrikethrough()));
 
         // Small caps, all caps
-        $xmlWriter->writeElementIf($style->isSmallCaps(), 'w:smallCaps');
-        $xmlWriter->writeElementIf($style->isAllCaps(), 'w:caps');
+        $xmlWriter->writeElementIf($style->isSmallCaps() !== null, 'w:smallCaps', 'w:val', $this->writeOnOf($style->isSmallCaps()));
+        $xmlWriter->writeElementIf($style->isAllCaps() !== null, 'w:caps', 'w:val', $this->writeOnOf($style->isAllCaps()));
 
         //Hidden text
-        $xmlWriter->writeElementIf($style->isHidden(), 'w:vanish');
+        $xmlWriter->writeElementIf($style->isHidden(), 'w:vanish', 'w:val', $this->writeOnOf($style->isHidden()));
 
         // Underline
         $xmlWriter->writeElementIf($style->getUnderline() != 'none', 'w:u', 'w:val', $style->getUnderline());
@@ -139,7 +139,7 @@ class Font extends AbstractStyle
         $xmlWriter->writeElementIf($style->getKerning() !== null, 'w:kern', 'w:val', $style->getKerning() * 2);
 
         // noProof
-        $xmlWriter->writeElementIf($style->isNoProof() !== false, 'w:noProof');
+        $xmlWriter->writeElementIf($style->isNoProof() !== null, 'w:noProof', $this->writeOnOf($style->isNoProof()));
 
         // Background-Color
         $shading = $style->getShading();
diff --git a/tests/PhpWord/Reader/Word2007/PartTest.php b/tests/PhpWord/Reader/Word2007/PartTest.php
index 31a492b8..6b7d9294 100644
--- a/tests/PhpWord/Reader/Word2007/PartTest.php
+++ b/tests/PhpWord/Reader/Word2007/PartTest.php
@@ -160,4 +160,76 @@ class PartTest extends AbstractTestReader
         $this->assertInstanceOf('PhpOffice\PhpWord\Element\Text', $endnote->getElement(0));
         $this->assertEquals('This is an endnote', $endnote->getElement(0)->getText());
     }
+
+    public function testReadHeadingWithOverriddenStyle()
+    {
+        $documentXml = '<w:p>
+            <w:pPr>
+                <w:pStyle w:val="Heading1"/>
+            </w:pPr>
+            <w:r>
+                <w:t>This is a bold </w:t>
+            </w:r>
+            <w:r w:rsidRPr="00377798">
+                <w:rPr>
+                    <w:b w:val="0"/>
+                </w:rPr>
+                <w:t>heading</w:t>
+            </w:r>
+            <w:r>
+                <w:t xml:space="preserve"> but with parts not in bold</w:t>
+            </w:r>
+            </w:p>';
+
+        $stylesXml = '<w:style w:type="paragraph" w:default="1" w:styleId="Normal">
+                <w:name w:val="Normal"/>
+                <w:qFormat/>
+            </w:style>
+            <w:style w:type="paragraph" w:styleId="Heading1">
+                <w:name w:val="heading 1"/>
+                <w:basedOn w:val="Normal"/>
+                <w:next w:val="Normal"/>
+                <w:link w:val="Heading1Char"/>
+                <w:uiPriority w:val="9"/>
+                <w:qFormat/>
+                <w:rsid w:val="00377798"/>
+                <w:pPr>
+                    <w:keepNext/>
+                    <w:keepLines/>
+                    <w:spacing w:before="240"/>
+                    <w:outlineLvl w:val="0"/>
+                </w:pPr>
+                <w:rPr>
+                    <w:rFonts w:asciiTheme="majorHAnsi" w:eastAsiaTheme="majorEastAsia" w:hAnsiTheme="majorHAnsi" w:cstheme="majorBidi"/>
+                    <w:b/>
+                    <w:color w:val="2F5496" w:themeColor="accent1" w:themeShade="BF"/>
+                    <w:sz w:val="32"/>
+                    <w:szCs w:val="32"/>
+                </w:rPr>
+            </w:style>';
+
+        $phpWord = $this->getDocumentFromString(array('document' => $documentXml, 'styles' => $stylesXml));
+
+        $elements = $phpWord->getSection(0)->getElements();
+        $this->assertInstanceOf('PhpOffice\PhpWord\Element\Title', $elements[0]);
+        /** @var \PhpOffice\PhpWord\Element\Title $title */
+        $title = $elements[0];
+        $this->assertEquals('Heading1', $title->getStyle());
+
+        /** @var \PhpOffice\PhpWord\Element\Text $text */
+        $text = $title->getText()->getElement(0);
+        $this->assertInstanceOf('PhpOffice\PhpWord\Element\Text', $text);
+        $this->assertEquals('This is a bold ', $text->getText());
+
+        /** @var \PhpOffice\PhpWord\Element\Text $text */
+        $text = $title->getText()->getElement(1);
+        $this->assertInstanceOf('PhpOffice\PhpWord\Element\Text', $text);
+        $this->assertEquals('heading', $text->getText());
+        $this->assertFalse($text->getFontStyle()->isBold());
+
+        /** @var \PhpOffice\PhpWord\Element\Text $text */
+        $text = $title->getText()->getElement(2);
+        $this->assertInstanceOf('PhpOffice\PhpWord\Element\Text', $text);
+        $this->assertEquals(' but with parts not in bold', $text->getText());
+    }
 }
diff --git a/tests/PhpWord/Reader/Word2007Test.php b/tests/PhpWord/Reader/Word2007Test.php
index e4ea62de..6d660ce5 100644
--- a/tests/PhpWord/Reader/Word2007Test.php
+++ b/tests/PhpWord/Reader/Word2007Test.php
@@ -62,7 +62,7 @@ class Word2007Test extends \PHPUnit\Framework\TestCase
         $this->assertEquals(100, $phpWord->getSettings()->getZoom());
 
         $doc = TestHelperDOCX::getDocument($phpWord);
-        $this->assertFalse($doc->elementExists('/w:document/w:body/w:p/w:r[w:t/node()="italics"]/w:rPr/w:b'));
+        $this->assertEquals('0', $doc->getElementAttribute('/w:document/w:body/w:p/w:r[w:t/node()="italics"]/w:rPr/w:b', 'w:val'));
     }
 
     /**