1 files changed, 1 insertions, 1 deletions
diff --git a/src/gui/text/qtextdocumentwriter.h b/src/gui/text/qtextdocumentwriter.h
index c0dea06f8f..b7743b1ff7 100644
--- a/src/gui/text/qtextdocumentwriter.h
+++ b/src/gui/text/qtextdocumentwriter.h
@@ -59,7 +59,7 @@ class Q_GUI_EXPORT QTextDocumentWriter
 public:
     QTextDocumentWriter();
     QTextDocumentWriter(QIODevice *device, const QByteArray &format);
-    QTextDocumentWriter(const QString &fileName, const QByteArray &format = QByteArray());
+    explicit QTextDocumentWriter(const QString &fileName, const QByteArray &format = QByteArray());
     ~QTextDocumentWriter();
 
     void setFormat (const QByteArray &format);