diff --git a/lib/TerminalDisplay.cpp b/lib/TerminalDisplay.cpp
index d6c1edfa..4b812a52 100644
--- a/lib/TerminalDisplay.cpp
+++ b/lib/TerminalDisplay.cpp
@@ -760,6 +760,7 @@ QColor TerminalDisplay::keyboardCursorColor() const
 void TerminalDisplay::setOpacity(qreal opacity)
 {
     _opacity = qBound(static_cast<qreal>(0), opacity, static_cast<qreal>(1));
+    update();
 }
 
 void TerminalDisplay::setBackgroundImage(const QString& backgroundImage)
diff --git a/lib/TerminalDisplay.h b/lib/TerminalDisplay.h
index 6f10aef8..0bc1a2ec 100644
--- a/lib/TerminalDisplay.h
+++ b/lib/TerminalDisplay.h
@@ -134,9 +134,6 @@ class KONSOLEPRIVATE_EXPORT TerminalDisplay : public QQuickPaintedItem
      */
     uint randomSeed() const;
 
-    /** Sets the opacity of the terminal display. */
-    void setOpacity(qreal opacity);
-
     /** 
      * This enum describes the location where the scroll bar is positioned in the display widget.
      */
@@ -596,6 +593,9 @@ public slots:
      */
     void setBackgroundColor(const QColor& color);
 
+    /** Sets the opacity of the terminal display. */
+    void setOpacity(qreal opacity);
+
     /**
      * Sets the text of the display to the specified color.
      * @see setColorTable(), setBackgroundColor()