diff --git a/src/libs/utils/icon.cpp b/src/libs/utils/icon.cpp
index ce9001b2ef0..bdf8601dcc2 100644
--- a/src/libs/utils/icon.cpp
+++ b/src/libs/utils/icon.cpp
@@ -58,7 +58,7 @@ static QPixmap maskToColorAndAlpha(const QPixmap &mask, const QColor &color)
 
 using MaskAndColor = QPair<QPixmap, QColor>;
 using MasksAndColors = QList<MaskAndColor>;
-static MasksAndColors masksAndColors(const Icon &icon, int dpr)
+static MasksAndColors masksAndColors(const QVector<IconMaskAndColor> &icon, int dpr)
 {
     MasksAndColors result;
     for (const IconMaskAndColor &i: icon) {
@@ -157,27 +157,27 @@ static QPixmap masksToIcon(const MasksAndColors &masks, const QPixmap &combinedM
 Icon::Icon() = default;
 
 Icon::Icon(std::initializer_list<IconMaskAndColor> args, Icon::IconStyleOptions style)
-    : QVector<IconMaskAndColor>(args)
+    : m_iconSourceList(args)
     , m_style(style)
 {
 }
 
 Icon::Icon(const FilePath &imageFileName)
 {
-    append({imageFileName, Theme::Color(-1)});
+    m_iconSourceList.append({imageFileName, Theme::Color(-1)});
 }
 
 QIcon Icon::icon() const
 {
-    if (isEmpty()) {
+    if (m_iconSourceList.isEmpty()) {
         return QIcon();
     } else if (m_style == None) {
-        return QIcon(constFirst().first.toString());
+        return QIcon(m_iconSourceList.constFirst().first.toString());
     } else {
         QIcon result;
         const int maxDpr = qRound(qApp->devicePixelRatio());
         for (int dpr = 1; dpr <= maxDpr; dpr++) {
-            const MasksAndColors masks = masksAndColors(*this, dpr);
+            const MasksAndColors masks = masksAndColors(m_iconSourceList, dpr);
             const QPixmap combinedMask = Utils::combinedMask(masks, m_style);
             result.addPixmap(masksToIcon(masks, combinedMask, m_style));
 
@@ -190,13 +190,13 @@ QIcon Icon::icon() const
 
 QPixmap Icon::pixmap(QIcon::Mode iconMode) const
 {
-    if (isEmpty()) {
+    if (m_iconSourceList.isEmpty()) {
         return QPixmap();
     } else if (m_style == None) {
-        return QPixmap(StyleHelper::dpiSpecificImageFile(constFirst().first.toString()));
+        return QPixmap(StyleHelper::dpiSpecificImageFile(m_iconSourceList.constFirst().first.toString()));
     } else {
         const MasksAndColors masks =
-                masksAndColors(*this, qRound(qApp->devicePixelRatio()));
+                masksAndColors(m_iconSourceList, qRound(qApp->devicePixelRatio()));
         const QPixmap combinedMask = Utils::combinedMask(masks, m_style);
         return iconMode == QIcon::Disabled
                 ? maskToColorAndAlpha(combinedMask, creatorTheme()->color(Theme::IconsDisabledColor))
@@ -206,8 +206,8 @@ QPixmap Icon::pixmap(QIcon::Mode iconMode) const
 
 FilePath Icon::imageFilePath() const
 {
-    QTC_ASSERT(length() == 1, return {});
-    return first().first;
+    QTC_ASSERT(m_iconSourceList.length() == 1, return {});
+    return m_iconSourceList.first().first;
 }
 
 QIcon Icon::sideBarIcon(const Icon &classic, const Icon &flat)
diff --git a/src/libs/utils/icon.h b/src/libs/utils/icon.h
index 92097fdf4ac..d2352be5055 100644
--- a/src/libs/utils/icon.h
+++ b/src/libs/utils/icon.h
@@ -46,7 +46,7 @@ using IconMaskAndColor = QPair<FilePath, Theme::Color>;
 
 // Returns a recolored icon with shadow and custom disabled state for a
 // series of grayscalemask|Theme::Color mask pairs
-class QTCREATOR_UTILS_EXPORT Icon : public QVector<IconMaskAndColor>
+class QTCREATOR_UTILS_EXPORT Icon
 {
 public:
     enum IconStyleOption {
@@ -86,6 +86,7 @@ public:
     static QIcon combinedIcon(const QList<Icon> &icons);
 
 private:
+    QVector<IconMaskAndColor> m_iconSourceList;
     IconStyleOptions m_style = None;
 };