diff --git a/krfb/mainwindow.cpp b/krfb/mainwindow.cpp
index c186526..ced23c1 100644
--- a/krfb/mainwindow.cpp
+++ b/krfb/mainwindow.cpp
@@ -39,7 +39,7 @@
 class TCP: public QWidget, public Ui::TCP
 {
 public:
-    TCP(QWidget *parent = nullptr) : QWidget(parent) {
+    explicit TCP(QWidget *parent = nullptr) : QWidget(parent) {
         setupUi(this);
     }
 };
diff --git a/krfb/trayicon.cpp b/krfb/trayicon.cpp
index 3eeb456..ba949c3 100644
--- a/krfb/trayicon.cpp
+++ b/krfb/trayicon.cpp
@@ -41,11 +41,11 @@ public:
     virtual ~ClientActions();
 
 private:
-    QMenu *m_menu;
-    QAction *m_title;
-    QAction *m_disconnectAction;
-    QAction *m_enableControlAction;
-    QAction *m_separator;
+    QMenu *m_menu = nullptr;
+    QAction *m_title = nullptr;
+    QAction *m_disconnectAction = nullptr;
+    QAction *m_enableControlAction = nullptr;
+    QAction *m_separator = nullptr;
 };
 
 ClientActions::ClientActions(RfbClient* client, QMenu* menu, QAction* before)