5 files changed, 6 insertions, 6 deletions
diff --git a/src/widgets/dialogs/qfilesystemmodel_p.h b/src/widgets/dialogs/qfilesystemmodel_p.h
index 48bd82d7d9..6474e0bb9d 100644
--- a/src/widgets/dialogs/qfilesystemmodel_p.h
+++ b/src/widgets/dialogs/qfilesystemmodel_p.h
@@ -81,7 +81,7 @@ public:
     class QFileSystemNode
     {
     public:
-        QFileSystemNode(const QString &filename = QString(), QFileSystemNode *p = 0)
+        explicit QFileSystemNode(const QString &filename = QString(), QFileSystemNode *p = 0)
             : fileName(filename), populatedChildren(false), isVisible(false), dirtyChildrenIndex(-1), parent(p), info(0) {}
         ~QFileSystemNode() {
             QHash<QString, QFileSystemNode*>::const_iterator i = children.constBegin();
diff --git a/src/widgets/dialogs/qfscompleter_p.h b/src/widgets/dialogs/qfscompleter_p.h
index eae972aa32..a5c4b3bc61 100644
--- a/src/widgets/dialogs/qfscompleter_p.h
+++ b/src/widgets/dialogs/qfscompleter_p.h
@@ -63,7 +63,7 @@ QT_BEGIN_NAMESPACE
   */
 class Q_WIDGETS_EXPORT QFSCompleter :  public QCompleter {
 public:
-    QFSCompleter(QFileSystemModel *model, QObject *parent = 0)
+    explicit QFSCompleter(QFileSystemModel *model, QObject *parent = 0)
         : QCompleter(model, parent), proxyModel(0), sourceModel(model)
     {
 #if defined(Q_OS_WIN)
diff --git a/src/widgets/styles/qwindowsxpstyle_p.h b/src/widgets/styles/qwindowsxpstyle_p.h
index 1ef60096c7..bce9e3b9d2 100644
--- a/src/widgets/styles/qwindowsxpstyle_p.h
+++ b/src/widgets/styles/qwindowsxpstyle_p.h
@@ -209,8 +209,8 @@ QT_BEGIN_NAMESPACE
 class XPThemeData
 {
 public:
-    XPThemeData(const QWidget *w = 0, QPainter *p = 0, int themeIn = -1,
-                int part = 0, int state = 0, const QRect &r = QRect())
+    explicit XPThemeData(const QWidget *w = 0, QPainter *p = 0, int themeIn = -1,
+                         int part = 0, int state = 0, const QRect &r = QRect())
         : widget(w), painter(p), theme(themeIn), htheme(0), partId(part), stateId(state),
           mirrorHorizontally(false), mirrorVertically(false), noBorder(false),
           noContent(false), rotate(0), rect(r)
diff --git a/src/widgets/util/qundostack_p.h b/src/widgets/util/qundostack_p.h
index 2b9735b7a7..681d4721e0 100644
--- a/src/widgets/util/qundostack_p.h
+++ b/src/widgets/util/qundostack_p.h
@@ -98,7 +98,7 @@ class QUndoAction : public QAction
 {
     Q_OBJECT
 public:
-    QUndoAction(const QString &prefix, QObject *parent = 0);
+    explicit QUndoAction(const QString &prefix, QObject *parent = 0);
     void setTextFormat(const QString &textFormat, const QString &defaultText);
 public Q_SLOTS:
     void setPrefixedText(const QString &text);
diff --git a/src/widgets/widgets/qdatetimeedit_p.h b/src/widgets/widgets/qdatetimeedit_p.h
index f7e6861677..73d8b9ebea 100644
--- a/src/widgets/widgets/qdatetimeedit_p.h
+++ b/src/widgets/widgets/qdatetimeedit_p.h
@@ -147,7 +147,7 @@ class QCalendarPopup : public QWidget
 {
     Q_OBJECT
 public:
-    QCalendarPopup(QWidget *parent = 0, QCalendarWidget *cw = 0);
+    explicit QCalendarPopup(QWidget *parent = 0, QCalendarWidget *cw = 0);
     QDate selectedDate() { return verifyCalendarInstance()->selectedDate(); }
     void setDate(const QDate &date);
     void setDateRange(const QDate &min, const QDate &max);