diff --git a/src/corelib/itemmodels/qconcatenatetablesproxymodel.cpp b/src/corelib/itemmodels/qconcatenatetablesproxymodel.cpp
index 44cf28b47a4..e6d12cd7552 100644
--- a/src/corelib/itemmodels/qconcatenatetablesproxymodel.cpp
+++ b/src/corelib/itemmodels/qconcatenatetablesproxymodel.cpp
@@ -446,10 +446,10 @@ void QConcatenateTablesProxyModel::addSourceModel(QAbstractItemModel *sourceMode
     connect(sourceModel, SIGNAL(columnsAboutToBeInserted(QModelIndex,int,int)), this, SLOT(_q_slotColumnsAboutToBeInserted(QModelIndex,int,int)));
     connect(sourceModel, SIGNAL(columnsAboutToBeRemoved(QModelIndex,int,int)), this, SLOT(_q_slotColumnsAboutToBeRemoved(QModelIndex,int,int)));
 
-    connect(sourceModel, SIGNAL(layoutAboutToBeChanged(QList<QPersistentModelIndex>, QAbstractItemModel::LayoutChangeHint)),
-            this, SLOT(_q_slotSourceLayoutAboutToBeChanged(QList<QPersistentModelIndex>, QAbstractItemModel::LayoutChangeHint)));
-    connect(sourceModel, SIGNAL(layoutChanged(QList<QPersistentModelIndex>, QAbstractItemModel::LayoutChangeHint)),
-            this, SLOT(_q_slotSourceLayoutChanged(QList<QPersistentModelIndex>, QAbstractItemModel::LayoutChangeHint)));
+    connect(sourceModel, SIGNAL(layoutAboutToBeChanged(QList<QPersistentModelIndex>,QAbstractItemModel::LayoutChangeHint)),
+            this, SLOT(_q_slotSourceLayoutAboutToBeChanged(QList<QPersistentModelIndex>,QAbstractItemModel::LayoutChangeHint)));
+    connect(sourceModel, SIGNAL(layoutChanged(QList<QPersistentModelIndex>,QAbstractItemModel::LayoutChangeHint)),
+            this, SLOT(_q_slotSourceLayoutChanged(QList<QPersistentModelIndex>,QAbstractItemModel::LayoutChangeHint)));
     connect(sourceModel, SIGNAL(modelAboutToBeReset()), this, SLOT(_q_slotModelAboutToBeReset()));
     connect(sourceModel, SIGNAL(modelReset()), this, SLOT(_q_slotModelReset()));
 
diff --git a/src/corelib/kernel/qobjectcleanuphandler.cpp b/src/corelib/kernel/qobjectcleanuphandler.cpp
index aae93ecc00a..f46afc2f071 100644
--- a/src/corelib/kernel/qobjectcleanuphandler.cpp
+++ b/src/corelib/kernel/qobjectcleanuphandler.cpp
@@ -60,7 +60,7 @@ QObject *QObjectCleanupHandler::add(QObject *object)
     if (!object)
         return nullptr;
 
-    connect(object, SIGNAL(destroyed(QObject *)), this, SLOT(objectDestroyed(QObject *)));
+    connect(object, SIGNAL(destroyed(QObject*)), this, SLOT(objectDestroyed(QObject*)));
     cleanupObjects.insert(0, object);
     return object;
 }
@@ -76,7 +76,7 @@ void QObjectCleanupHandler::remove(QObject *object)
     int index;
     if ((index = cleanupObjects.indexOf(object)) != -1) {
         cleanupObjects.removeAt(index);
-        disconnect(object, SIGNAL(destroyed(QObject *)), this, SLOT(objectDestroyed(QObject *)));
+        disconnect(object, SIGNAL(destroyed(QObject*)), this, SLOT(objectDestroyed(QObject*)));
     }
 }
 
diff --git a/src/plugins/networkinformation/networkmanager/qnetworkmanagerservice.cpp b/src/plugins/networkinformation/networkmanager/qnetworkmanagerservice.cpp
index 3a64c1892ca..4c0ea14151c 100644
--- a/src/plugins/networkinformation/networkmanager/qnetworkmanagerservice.cpp
+++ b/src/plugins/networkinformation/networkmanager/qnetworkmanagerservice.cpp
@@ -59,14 +59,14 @@ QNetworkManagerInterface::QNetworkManagerInterface(QObject *parent)
 
     QDBusConnection::systemBus().connect(NM_DBUS_SERVICE ""_L1, NM_DBUS_PATH ""_L1,
             DBUS_PROPERTIES_INTERFACE""_L1, "PropertiesChanged"_L1, this,
-            SLOT(setProperties(QString, QMap<QString, QVariant>, QList<QString>)));
+            SLOT(setProperties(QString,QMap<QString,QVariant>,QList<QString>)));
 }
 
 QNetworkManagerInterface::~QNetworkManagerInterface()
 {
     QDBusConnection::systemBus().disconnect(NM_DBUS_SERVICE ""_L1, NM_DBUS_PATH ""_L1,
             DBUS_PROPERTIES_INTERFACE ""_L1, "PropertiesChanged"_L1, this,
-            SLOT(setProperties(QString, QMap<QString, QVariant>, QList<QString>)));
+            SLOT(setProperties(QString,QMap<QString,QVariant>,QList<QString>)));
 }
 
 QNetworkManagerInterface::NMState QNetworkManagerInterface::state() const
diff --git a/src/widgets/itemviews/qabstractitemview.cpp b/src/widgets/itemviews/qabstractitemview.cpp
index ac1eb0c78d0..198d8dafe05 100644
--- a/src/widgets/itemviews/qabstractitemview.cpp
+++ b/src/widgets/itemviews/qabstractitemview.cpp
@@ -661,8 +661,8 @@ void QAbstractItemView::setModel(QAbstractItemModel *model)
     if (d->model && d->model != QAbstractItemModelPrivate::staticEmptyModel()) {
         disconnect(d->model, SIGNAL(destroyed()),
                    this, SLOT(_q_modelDestroyed()));
-        disconnect(d->model, SIGNAL(dataChanged(QModelIndex, QModelIndex, QList<int>)), this,
-                   SLOT(dataChanged(QModelIndex, QModelIndex, QList<int>)));
+        disconnect(d->model, SIGNAL(dataChanged(QModelIndex,QModelIndex,QList<int>)), this,
+                   SLOT(dataChanged(QModelIndex,QModelIndex,QList<int>)));
         disconnect(d->model, SIGNAL(headerDataChanged(Qt::Orientation,int,int)),
                    this, SLOT(_q_headerDataChanged()));
         disconnect(d->model, SIGNAL(rowsInserted(QModelIndex,int,int)),
@@ -692,8 +692,8 @@ void QAbstractItemView::setModel(QAbstractItemModel *model)
     if (d->model != QAbstractItemModelPrivate::staticEmptyModel()) {
         connect(d->model, SIGNAL(destroyed()),
                 this, SLOT(_q_modelDestroyed()));
-        connect(d->model, SIGNAL(dataChanged(QModelIndex, QModelIndex, QList<int>)), this,
-                SLOT(dataChanged(QModelIndex, QModelIndex, QList<int>)));
+        connect(d->model, SIGNAL(dataChanged(QModelIndex,QModelIndex,QList<int>)), this,
+                SLOT(dataChanged(QModelIndex,QModelIndex,QList<int>)));
         connect(d->model, SIGNAL(headerDataChanged(Qt::Orientation,int,int)),
                 this, SLOT(_q_headerDataChanged()));
         connect(d->model, SIGNAL(rowsInserted(QModelIndex,int,int)),
diff --git a/src/widgets/itemviews/qdatawidgetmapper.cpp b/src/widgets/itemviews/qdatawidgetmapper.cpp
index 5160d06519f..547627cd933 100644
--- a/src/widgets/itemviews/qdatawidgetmapper.cpp
+++ b/src/widgets/itemviews/qdatawidgetmapper.cpp
@@ -315,8 +315,8 @@ void QDataWidgetMapper::setModel(QAbstractItemModel *model)
         return;
 
     if (d->model) {
-        disconnect(d->model, SIGNAL(dataChanged(QModelIndex, QModelIndex, QList<int>)), this,
-                   SLOT(_q_dataChanged(QModelIndex, QModelIndex, QList<int>)));
+        disconnect(d->model, SIGNAL(dataChanged(QModelIndex,QModelIndex,QList<int>)), this,
+                   SLOT(_q_dataChanged(QModelIndex,QModelIndex,QList<int>)));
         disconnect(d->model, SIGNAL(destroyed()), this,
                    SLOT(_q_modelDestroyed()));
     }
@@ -326,8 +326,8 @@ void QDataWidgetMapper::setModel(QAbstractItemModel *model)
 
     d->model = model;
 
-    connect(model, SIGNAL(dataChanged(QModelIndex, QModelIndex, QList<int>)),
-            SLOT(_q_dataChanged(QModelIndex, QModelIndex, QList<int>)));
+    connect(model, SIGNAL(dataChanged(QModelIndex,QModelIndex,QList<int>)),
+            SLOT(_q_dataChanged(QModelIndex,QModelIndex,QList<int>)));
     connect(model, SIGNAL(destroyed()), SLOT(_q_modelDestroyed()));
 }