diff --git a/src/gui/image/qimage.cpp b/src/gui/image/qimage.cpp
index c3b4b1444a..5de686c1ea 100644
--- a/src/gui/image/qimage.cpp
+++ b/src/gui/image/qimage.cpp
@@ -1368,7 +1368,7 @@ void QImage::setColorTable(const QVector<QRgb> colors)
     if (!d)
         return;
 
-    d->colortable = colors;
+    d->colortable = qMove(const_cast<QVector<QRgb>&>(colors));
     d->has_alpha_clut = false;
     for (int i = 0; i < d->colortable.size(); ++i) {
         if (qAlpha(d->colortable.at(i)) != 255) {
diff --git a/src/gui/image/qimage.h b/src/gui/image/qimage.h
index 844bbb2eba..3e73462efc 100644
--- a/src/gui/image/qimage.h
+++ b/src/gui/image/qimage.h
@@ -232,7 +232,7 @@ public:
     void setPixel(const QPoint &pt, uint index_or_rgb);
 
     QVector<QRgb> colorTable() const;
-    void setColorTable(const QVector<QRgb> colors);
+    void setColorTable(const QVector<QRgb> colors); // ### Qt 6: remove const
 
     qreal devicePixelRatio() const;
     void setDevicePixelRatio(qreal scaleFactor);