1 files changed, 4 insertions, 3 deletions
diff --git a/src/plugins/help/helpviewer.cpp b/src/plugins/help/helpviewer.cpp
index d8726a99cb..a88393c665 100644
--- a/src/plugins/help/helpviewer.cpp
+++ b/src/plugins/help/helpviewer.cpp
@@ -109,10 +109,11 @@ bool HelpViewer::canOpenPage(const QString &url)
     return !mimeFromUrl(url).isEmpty();
 }
 
-QString HelpViewer::mimeFromUrl(const QString &url)
+QString HelpViewer::mimeFromUrl(const QUrl &url)
 {
-    const int index = url.lastIndexOf(QLatin1Char('.'));
-    const QByteArray &ext = url.mid(index).toUtf8().toLower();
+    const QString &path = url.path();
+    const int index = path.lastIndexOf(QLatin1Char('.'));
+    const QByteArray &ext = path.mid(index).toUtf8().toLower();
 
     const ExtensionMap *e = extensionMap;
     while (e->extension) {