diff --git a/src/libs/vpropertyexplorer/checkablemessagebox.cpp b/src/libs/vpropertyexplorer/checkablemessagebox.cpp
index 00747cce3..16c80218b 100644
--- a/src/libs/vpropertyexplorer/checkablemessagebox.cpp
+++ b/src/libs/vpropertyexplorer/checkablemessagebox.cpp
@@ -44,7 +44,7 @@ class CheckableMessageBoxPrivate
 {
 public:
     CheckableMessageBoxPrivate(QDialog *q)
-        : clickedButton(0)
+        : pixmapLabel(nullptr), messageLabel(nullptr), checkBox(nullptr), buttonBox(nullptr), clickedButton(nullptr)
     {
         QSizePolicy sizePolicy(QSizePolicy::Minimum, QSizePolicy::Preferred);
 
@@ -100,6 +100,8 @@ public:
     QCheckBox *checkBox;
     QDialogButtonBox *buttonBox;
     QAbstractButton *clickedButton;
+private:
+    Q_DISABLE_COPY(CheckableMessageBoxPrivate)
 };
 
 CheckableMessageBox::CheckableMessageBox(QWidget *parent) :
diff --git a/src/libs/vpropertyexplorer/checkablemessagebox.h b/src/libs/vpropertyexplorer/checkablemessagebox.h
index 29b148446..467934d5d 100644
--- a/src/libs/vpropertyexplorer/checkablemessagebox.h
+++ b/src/libs/vpropertyexplorer/checkablemessagebox.h
@@ -120,6 +120,7 @@ private slots:
     void slotClicked(QAbstractButton *b);
 
 private:
+    Q_DISABLE_COPY(CheckableMessageBox)
     CheckableMessageBoxPrivate *d;
 };