diff --git a/src/plugins/qmldesigner/components/collectioneditor/collectiondetailssortfiltermodel.cpp b/src/plugins/qmldesigner/components/collectioneditor/collectiondetailssortfiltermodel.cpp
index 5fa82ace937..64bdb8a64d1 100644
--- a/src/plugins/qmldesigner/components/collectioneditor/collectiondetailssortfiltermodel.cpp
+++ b/src/plugins/qmldesigner/components/collectioneditor/collectiondetailssortfiltermodel.cpp
@@ -64,8 +64,8 @@ bool CollectionDetailsSortFilterModel::selectColumn(int column)
 
 CollectionDetailsSortFilterModel::~CollectionDetailsSortFilterModel() = default;
 
-bool CollectionDetailsSortFilterModel::filterAcceptsRow(int sourceRow,
-                                                        const QModelIndex &sourceParent) const
+bool CollectionDetailsSortFilterModel::filterAcceptsRow(
+    [[maybe_unused]] int sourceRow, [[maybe_unused]] const QModelIndex &sourceParent) const
 {
     return true;
 }
diff --git a/src/plugins/qmldesigner/components/collectioneditor/collectiondetailssortfiltermodel.h b/src/plugins/qmldesigner/components/collectioneditor/collectiondetailssortfiltermodel.h
index bb2c68126d7..fdf6f2df9aa 100644
--- a/src/plugins/qmldesigner/components/collectioneditor/collectiondetailssortfiltermodel.h
+++ b/src/plugins/qmldesigner/components/collectioneditor/collectiondetailssortfiltermodel.h
@@ -3,6 +3,7 @@
 
 #pragma once
 
+#include <QPointer>
 #include <QSortFilterProxyModel>
 
 namespace QmlDesigner {
diff --git a/src/plugins/qmldesigner/components/collectioneditor/collectioneditorutils.cpp b/src/plugins/qmldesigner/components/collectioneditor/collectioneditorutils.cpp
index b18ea366bb6..69e39aedca1 100644
--- a/src/plugins/qmldesigner/components/collectioneditor/collectioneditorutils.cpp
+++ b/src/plugins/qmldesigner/components/collectioneditor/collectioneditorutils.cpp
@@ -12,6 +12,11 @@ namespace {
 
 using CollectionDataVariant = std::variant<QString, bool, double, QUrl, QColor>;
 
+inline bool operator<(const QColor &a, const QColor &b)
+{
+    return a.name(QColor::HexArgb) < b.name(QColor::HexArgb);
+}
+
 inline CollectionDataVariant valueToVariant(const QVariant &value,
                                             QmlDesigner::CollectionDetails::DataType type)
 {
@@ -45,12 +50,6 @@ struct LessThanVisitor
     {
         return a < b;
     }
-
-    template<>
-    bool operator()(const QColor &a, const QColor &b) const
-    {
-        return a.name(QColor::HexArgb) < b.name(QColor::HexArgb);
-    }
 };
 
 } // namespace