diff --git a/processui/ksysguardprocesslist.h b/processui/ksysguardprocesslist.h
--- a/processui/ksysguardprocesslist.h
+++ b/processui/ksysguardprocesslist.h
@@ -208,7 +208,7 @@
         void filterTextChanged(const QString &newText);
 
         /** Called when one of the actions (kill, renice etc) is clicked etc */
-        void actionTriggered(QObject *object);
+        void actionTriggered(QAction *result);
 
     protected:
         /** Inherit QWidget::showEvent(QShowEvent *) to enable the timer, for updates, when visible */
diff --git a/processui/ksysguardprocesslist.cpp b/processui/ksysguardprocesslist.cpp
--- a/processui/ksysguardprocesslist.cpp
+++ b/processui/ksysguardprocesslist.cpp
@@ -40,7 +40,6 @@
 #include <QStyledItemDelegate>
 #include <QPainter>
 #include <QLineEdit>
-#include <QSignalMapper>
 #include <QToolTip>
 #include <QAbstractItemModel>
 #include <QDBusMetaType>
@@ -369,17 +368,14 @@
     d->mUi->treeView->sortByColumn(ProcessModel::HeadingUser, Qt::AscendingOrder);
 
     // Add all the actions to the main widget, and get all the actions to call actionTriggered when clicked
-    QSignalMapper *signalMapper = new QSignalMapper(this);
     QList<QAction *> actions;
     actions << d->renice << d->kill << d->terminate << d->selectParent << d->selectTracer << d->window << d->jumpToSearchFilter;
     actions << d->resume << d->sigStop << d->sigCont << d->sigHup << d->sigInt << d->sigTerm << d->sigKill << d->sigUsr1 << d->sigUsr2;
 
     foreach(QAction *action, actions) {
         addAction(action);
-        connect(action, SIGNAL(triggered(bool)), signalMapper, SLOT(map()));
-        signalMapper->setMapping(action, action);
+        connect(action, &QAction::triggered, this, [this, action]() { actionTriggered(action); });
     }
-    connect(signalMapper, SIGNAL(mapped(QObject*)), SLOT(actionTriggered(QObject*)));
 
     retranslateUi();
 
@@ -620,12 +616,11 @@
 
     d->mProcessContextMenu->popup(d->mUi->treeView->viewport()->mapToGlobal(point));
 }
-void KSysGuardProcessList::actionTriggered(QObject *object) {
+void KSysGuardProcessList::actionTriggered(QAction *result) {
     if(!isVisible()) //Ignore triggered actions if we are not visible!
         return;
     //Reset the text back to normal
     d->selectParent->setText(i18n("Jump to Parent Process"));
-    QAction *result = qobject_cast<QAction *>(object);
     if(result == nullptr) {
         //Escape was pressed. Do nothing.
     } else if(result == d->renice) {