diff --git a/ui/annotationwidgets.cpp b/ui/annotationwidgets.cpp
--- a/ui/annotationwidgets.cpp
+++ b/ui/annotationwidgets.cpp
@@ -535,12 +535,12 @@
         connect( m_useColor, &QAbstractButton::toggled, this, &AnnotationWidget::dataChanged );
         connect(m_useColor, &QCheckBox::toggled, m_innerColor, &KColorButton::setEnabled);
     }
-    connect( m_spinSize, SIGNAL(valueChanged(double)), this, SIGNAL(dataChanged()) );
+    connect( m_spinSize, static_cast<void (QDoubleSpinBox::*)(double)>(&QDoubleSpinBox::valueChanged), this, &LineAnnotationWidget::dataChanged );
 
     //Line Term Styles
     QLabel * tmplabel3 = new QLabel( i18n( "Line End:" ), widget );
     gridlay2->addWidget( tmplabel3, 1, 0, Qt::AlignRight );
-    m_termStyleCombo = new KComboBox( widget );
+    m_termStyleCombo = new QComboBox( widget );
     tmplabel3->setBuddy( m_termStyleCombo );
     gridlay2->addWidget( m_termStyleCombo );
     tmplabel3->setToolTip( i18n("Only for PDF documents"));
@@ -558,7 +558,7 @@
     m_termStyleCombo->addItem( i18n( "-/ Slash" ) );
     m_termStyleCombo->setCurrentIndex( m_lineAnn->lineEndStyle() );
 
-    connect( m_termStyleCombo, SIGNAL(currentIndexChanged(int)), this, SIGNAL(dataChanged()) );
+    connect( m_termStyleCombo, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &LineAnnotationWidget::dataChanged );
 
     return widget;
 }