diff --git a/src/kitemviews/private/kbaloorolesprovider.cpp b/src/kitemviews/private/kbaloorolesprovider.cpp
index f2473de3af..f980cbec06 100644
--- a/src/kitemviews/private/kbaloorolesprovider.cpp
+++ b/src/kitemviews/private/kbaloorolesprovider.cpp
@@ -15,6 +15,17 @@
 #include <QDebug>
 #include <QTime>
 
+namespace {
+    QString tagsFromValues(const QStringList& values)
+    {
+        QStringList alphabeticalOrderTags = values;
+        QCollator coll;
+        coll.setNumericMode(true);
+        std::sort(alphabeticalOrderTags.begin(), alphabeticalOrderTags.end(), [&](const QString& s1, const QString& s2){ return coll.compare(s1, s2) < 0; });
+        return alphabeticalOrderTags.join(QLatin1String(", "));
+    }
+}
+
 struct KBalooRolesProviderSingleton
 {
     KBalooRolesProvider instance;
@@ -137,13 +148,6 @@ KBalooRolesProvider::KBalooRolesProvider() :
         m_roleForProperty.insert(propertyInfoList[i].property, propertyInfoList[i].role);
         m_roles.insert(propertyInfoList[i].role);
     }
+
 }
 
-QString KBalooRolesProvider::tagsFromValues(const QStringList& values) const
-{
-    QStringList alphabeticalOrderTags = values;
-    QCollator coll;
-    coll.setNumericMode(true);
-    std::sort(alphabeticalOrderTags.begin(), alphabeticalOrderTags.end(), [&](const QString& s1, const QString& s2){ return coll.compare(s1, s2) < 0; });
-    return alphabeticalOrderTags.join(QLatin1String(", "));
-}
diff --git a/src/kitemviews/private/kbaloorolesprovider.h b/src/kitemviews/private/kbaloorolesprovider.h
index 99c601e16b..8b7bbbafac 100644
--- a/src/kitemviews/private/kbaloorolesprovider.h
+++ b/src/kitemviews/private/kbaloorolesprovider.h
@@ -47,13 +47,6 @@ public:
 protected:
     KBalooRolesProvider();
 
-private:
-    /**
-     * @return User visible string for the given tag-values.
-     *         The tag-values are sorted in alphabetical order.
-     */
-    QString tagsFromValues(const QStringList& values) const;
-
 private:
     QSet<QByteArray> m_roles;
     QHash<QString, QByteArray> m_roleForProperty;