diff --git a/src/corelib/tools/qcollator_icu.cpp b/src/corelib/tools/qcollator_icu.cpp
index 26e21210922..ad98a187c52 100644
--- a/src/corelib/tools/qcollator_icu.cpp
+++ b/src/corelib/tools/qcollator_icu.cpp
@@ -145,7 +145,7 @@ QCollatorSortKey QCollator::sortKey(const QString &string) const
                                    string.size(), (uint8_t *)result.data(), result.size());
         }
         result.truncate(size);
-        return QCollatorSortKey(new QCollatorSortKeyPrivate(result));
+        return QCollatorSortKey(new QCollatorSortKeyPrivate(std::move(result)));
     }
 
     return QCollatorSortKey(new QCollatorSortKeyPrivate(QByteArray()));
diff --git a/src/corelib/tools/qcollator_macx.cpp b/src/corelib/tools/qcollator_macx.cpp
index c4eb8e69787..d4682724301 100644
--- a/src/corelib/tools/qcollator_macx.cpp
+++ b/src/corelib/tools/qcollator_macx.cpp
@@ -131,7 +131,7 @@ QCollatorSortKey QCollator::sortKey(const QString &string) const
                           ret.size(), &actualSize, ret.data());
     }
     ret[actualSize] = 0;
-    return QCollatorSortKey(new QCollatorSortKeyPrivate(ret));
+    return QCollatorSortKey(new QCollatorSortKeyPrivate(std::move(ret)));
 }
 
 int QCollatorSortKey::compare(const QCollatorSortKey &key) const
diff --git a/src/corelib/tools/qcollator_p.h b/src/corelib/tools/qcollator_p.h
index 6ac79e820df..c03a3431db9 100644
--- a/src/corelib/tools/qcollator_p.h
+++ b/src/corelib/tools/qcollator_p.h
@@ -131,9 +131,10 @@ class QCollatorSortKeyPrivate : public QSharedData
 {
     friend class QCollator;
 public:
-    QCollatorSortKeyPrivate(const CollatorKeyType &key)
+    template <typename...T>
+    explicit QCollatorSortKeyPrivate(T &&...args)
         : QSharedData()
-        , m_key(key)
+        , m_key(std::forward<T>(args)...)
     {
     }
 
diff --git a/src/corelib/tools/qcollator_posix.cpp b/src/corelib/tools/qcollator_posix.cpp
index da424970e68..42413a4a82b 100644
--- a/src/corelib/tools/qcollator_posix.cpp
+++ b/src/corelib/tools/qcollator_posix.cpp
@@ -110,7 +110,7 @@ QCollatorSortKey QCollator::sortKey(const QString &string) const
     }
     result.resize(size+1);
     result[size] = 0;
-    return QCollatorSortKey(new QCollatorSortKeyPrivate(result));
+    return QCollatorSortKey(new QCollatorSortKeyPrivate(std::move(result)));
 }
 
 int QCollatorSortKey::compare(const QCollatorSortKey &otherKey) const
diff --git a/src/corelib/tools/qcollator_win.cpp b/src/corelib/tools/qcollator_win.cpp
index 44beaeaf757..bce896278e6 100644
--- a/src/corelib/tools/qcollator_win.cpp
+++ b/src/corelib/tools/qcollator_win.cpp
@@ -147,7 +147,7 @@ QCollatorSortKey QCollator::sortKey(const QString &string) const
     if (finalSize == 0) {
         qWarning() << "there were problems when generating the ::sortKey by LCMapStringW with error:" << GetLastError();
     }
-    return QCollatorSortKey(new QCollatorSortKeyPrivate(ret));
+    return QCollatorSortKey(new QCollatorSortKeyPrivate(std::move(ret)));
 }
 
 int QCollatorSortKey::compare(const QCollatorSortKey &otherKey) const