4 files changed, 4 insertions, 4 deletions
diff --git a/src/gui/text/qcssparser_p.h b/src/gui/text/qcssparser_p.h
index 0dc4438d04..826e0b309d 100644
--- a/src/gui/text/qcssparser_p.h
+++ b/src/gui/text/qcssparser_p.h
@@ -752,7 +752,7 @@ class Q_GUI_EXPORT Parser
 {
 public:
     Parser();
-    Parser(const QString &css, bool file = false);
+    explicit Parser(const QString &css, bool file = false);
 
     void init(const QString &css, bool file = false);
     bool parse(StyleSheet *styleSheet, Qt::CaseSensitivity nameCaseSensitivity = Qt::CaseSensitive);
diff --git a/src/gui/text/qfontsubset_p.h b/src/gui/text/qfontsubset_p.h
index a120a18d3a..3607b0189c 100644
--- a/src/gui/text/qfontsubset_p.h
+++ b/src/gui/text/qfontsubset_p.h
@@ -60,7 +60,7 @@ QT_BEGIN_NAMESPACE
 class QFontSubset
 {
 public:
-    QFontSubset(QFontEngine *fe, int obj_id = 0)
+    explicit QFontSubset(QFontEngine *fe, int obj_id = 0)
         : object_id(obj_id), noEmbed(false), fontEngine(fe), downloaded_glyphs(0), standard_font(false)
         { fontEngine->ref.ref(); addGlyph(0); }
     ~QFontSubset() {
diff --git a/src/gui/text/qzipreader_p.h b/src/gui/text/qzipreader_p.h
index 7783c5bba3..06356cd6ab 100644
--- a/src/gui/text/qzipreader_p.h
+++ b/src/gui/text/qzipreader_p.h
@@ -66,7 +66,7 @@ class QZipReaderPrivate;
 class Q_GUI_EXPORT QZipReader
 {
 public:
-    QZipReader(const QString &fileName, QIODevice::OpenMode mode = QIODevice::ReadOnly );
+    explicit QZipReader(const QString &fileName, QIODevice::OpenMode mode = QIODevice::ReadOnly );
 
     explicit QZipReader(QIODevice *device);
     ~QZipReader();
diff --git a/src/gui/text/qzipwriter_p.h b/src/gui/text/qzipwriter_p.h
index 5fcc48a10b..556699a62f 100644
--- a/src/gui/text/qzipwriter_p.h
+++ b/src/gui/text/qzipwriter_p.h
@@ -64,7 +64,7 @@ class QZipWriterPrivate;
 class Q_GUI_EXPORT QZipWriter
 {
 public:
-    QZipWriter(const QString &fileName, QIODevice::OpenMode mode = (QIODevice::WriteOnly | QIODevice::Truncate) );
+    explicit QZipWriter(const QString &fileName, QIODevice::OpenMode mode = (QIODevice::WriteOnly | QIODevice::Truncate) );
 
     explicit QZipWriter(QIODevice *device);
     ~QZipWriter();