title: QT Cannot include file QtWebKitWidgets : No such file or directory
body: <p>In .pro file I have the line:</p>
  
  <pre><code>QT += core gui webkitwidgets
  </code></pre>
  
  <p>and:</p>
  
  <pre><code>#include &lt;QtWebKitWidgets&gt;
  </code></pre>
  
  <p>But I get:</p>
  
  <pre><code>error: C1083: Cannot open include file: 'QtWebKitWidgets': No such file or directory
  </code></pre>
  
  <p>Answers to similar questions on Stackoverflow did not help. How to solve this problem?
  <p>OS: Windows 8.1
  <p>Qt version: 5.5.1</p>