diff --git a/kman/kmanmainwindow.cpp b/kman/kmanmainwindow.cpp
index 04d998c0..74ac2576 100644
--- a/kman/kmanmainwindow.cpp
+++ b/kman/kmanmainwindow.cpp
@@ -202,7 +202,7 @@ KManMainWindow::~KManMainWindow()
     delete m_kmanui;
 }
 
-void KManMainWindow::changePath(const QString path) {
+void KManMainWindow::changePath(const QString &path) {
     if (path.isEmpty()) {
         return;
     }
@@ -318,7 +318,7 @@ void KManMainWindow::slotListChanged(const QString &text) {
     }
 }
 
-void KManMainWindow::slotListResult(const QString path, const QString fancy) {
+void KManMainWindow::slotListResult(const QString &path, const QString &fancy) {
     QListWidgetItem* manitem = new QListWidgetItem(KIcon("application-x-troff-man"), fancy, m_kmanui->listWidget);
     m_kmanui->listWidget->addItem(manitem);
 }
@@ -351,7 +351,7 @@ void KManMainWindow::listManPages() {
     }
 }
 
-QString KManMainWindow::manContent(const QString path) {
+QString KManMainWindow::manContent(const QString &path) {
     QString result;
 
     if (QStandardPaths::findExecutable("groff").isEmpty()) {
diff --git a/kman/kmanmainwindow.h b/kman/kmanmainwindow.h
index 5f93edde..8d9dace1 100644
--- a/kman/kmanmainwindow.h
+++ b/kman/kmanmainwindow.h
@@ -35,7 +35,7 @@ public:
     KManMainWindow(QWidget *parent = 0, Qt::WindowFlags flags = 0);
     ~KManMainWindow();
 
-    void changePath(const QString path);
+    void changePath(const QString &path);
 
 public slots:
     void slotOpenAction();
@@ -49,13 +49,13 @@ public slots:
     void slotListChanged(const QString &text);
 
 private slots:
-    void slotListResult(const QString path, const QString fancy);
+    void slotListResult(const QString &path, const QString &fancy);
     void slotBusyStart();
     void slotBusyFinish();
 
 private:
     void listManPages();
-    QString manContent(const QString path);
+    QString manContent(const QString &path);
 
 private:
     Ui_KManWindow *m_kmanui;