diff --git a/core/backends/lan/server.h b/core/backends/lan/server.h
index d47560a24..3d8d25112 100644
--- a/core/backends/lan/server.h
+++ b/core/backends/lan/server.h
@@ -18,7 +18,7 @@ class KDECONNECTCORE_EXPORT Server : public QTcpServer
     Q_OBJECT
 
 public:
-    Server(QObject *parent = 0);
+    Server(QObject *parent = nullptr);
     ~Server() override = default;
 
     QSslSocket *nextPendingConnection() override;
diff --git a/kcm/kcm.cpp b/kcm/kcm.cpp
index 7b5a1497d..84314fd01 100644
--- a/kcm/kcm.cpp
+++ b/kcm/kcm.cpp
@@ -149,7 +149,7 @@ void KdeConnectKcm::resetSelection()
 void KdeConnectKcm::deviceSelected(const QModelIndex &current)
 {
     if (currentDevice) {
-        disconnect(currentDevice, 0, this, 0);
+        disconnect(currentDevice, nullptr, this, nullptr);
     }
 
     if (!current.isValid()) {