4 files changed, 7 insertions, 7 deletions
diff --git a/src/corelib/io/qdir_p.h b/src/corelib/io/qdir_p.h
index 88d681996d..10a82cd580 100644
--- a/src/corelib/io/qdir_p.h
+++ b/src/corelib/io/qdir_p.h
@@ -50,11 +50,11 @@ QT_BEGIN_NAMESPACE
 class QDirPrivate : public QSharedData
 {
 public:
-    QDirPrivate(const QString &path, const QStringList &nameFilters_ = QStringList(),
-            QDir::SortFlags sort_ = QDir::SortFlags(QDir::Name | QDir::IgnoreCase),
-            QDir::Filters filters_ = QDir::AllEntries);
+    explicit QDirPrivate(const QString &path, const QStringList &nameFilters_ = QStringList(),
+                         QDir::SortFlags sort_ = QDir::SortFlags(QDir::Name | QDir::IgnoreCase),
+                         QDir::Filters filters_ = QDir::AllEntries);
 
-    QDirPrivate(const QDirPrivate &copy);
+    explicit QDirPrivate(const QDirPrivate &copy);
 
     bool exists() const;
 
diff --git a/src/corelib/io/qwindowspipewriter_p.h b/src/corelib/io/qwindowspipewriter_p.h
index fd648deefc..affd17f3e2 100644
--- a/src/corelib/io/qwindowspipewriter_p.h
+++ b/src/corelib/io/qwindowspipewriter_p.h
@@ -123,7 +123,7 @@ Q_SIGNALS:
     void bytesWritten(qint64 bytes);
 
 public:
-    QWindowsPipeWriter(HANDLE writePipe, QObject * parent = 0);
+    explicit QWindowsPipeWriter(HANDLE writePipe, QObject * parent = 0);
     ~QWindowsPipeWriter();
 
     bool waitForWrite(int msecs);
diff --git a/src/corelib/plugin/qfactoryloader_p.h b/src/corelib/plugin/qfactoryloader_p.h
index 907df386d5..02ed8cfc71 100644
--- a/src/corelib/plugin/qfactoryloader_p.h
+++ b/src/corelib/plugin/qfactoryloader_p.h
@@ -70,7 +70,7 @@ class Q_CORE_EXPORT QFactoryLoader : public QObject
     Q_DECLARE_PRIVATE(QFactoryLoader)
 
 public:
-    QFactoryLoader(const char *iid,
+    explicit QFactoryLoader(const char *iid,
                    const QString &suffix = QString(),
                    Qt::CaseSensitivity = Qt::CaseSensitive);
     ~QFactoryLoader();
diff --git a/src/corelib/tools/qlocale_p.h b/src/corelib/tools/qlocale_p.h
index 09a3e0eb51..40d12a33b9 100644
--- a/src/corelib/tools/qlocale_p.h
+++ b/src/corelib/tools/qlocale_p.h
@@ -186,7 +186,7 @@ public:
 class Q_CORE_EXPORT QLocalePrivate : public QSharedData
 {
 public:
-    QLocalePrivate(int index, int numberOptions = 0)
+    explicit QLocalePrivate(int index, int numberOptions = 0)
         : m_index(index), m_numberOptions(numberOptions)
     {
         m_data = dataPointerForIndex(index);