diff --git a/src/plugins/cppeditor/cpptoolsreuse.cpp b/src/plugins/cppeditor/cpptoolsreuse.cpp
index 7be177c2c1b..40576da3d24 100644
--- a/src/plugins/cppeditor/cpptoolsreuse.cpp
+++ b/src/plugins/cppeditor/cpptoolsreuse.cpp
@@ -146,22 +146,22 @@ void moveCursorToStartOfIdentifier(QTextCursor *tc)
 
 static bool isOwnershipRAIIName(const QString &name)
 {
-    static QSet<QString> knownNames;
-    if (knownNames.isEmpty()) {
+    static const QSet<QString> knownNames {
         // Qt
-        knownNames.insert(QLatin1String("QScopedPointer"));
-        knownNames.insert(QLatin1String("QScopedArrayPointer"));
-        knownNames.insert(QLatin1String("QMutexLocker"));
-        knownNames.insert(QLatin1String("QReadLocker"));
-        knownNames.insert(QLatin1String("QWriteLocker"));
-        // Standard C++
-        knownNames.insert(QLatin1String("auto_ptr"));
-        knownNames.insert(QLatin1String("unique_ptr"));
-        // Boost
-        knownNames.insert(QLatin1String("scoped_ptr"));
-        knownNames.insert(QLatin1String("scoped_array"));
-    }
+        "QMutexLocker",
+        "QReadLocker",
+        "QScopedArrayPointer",
+        "QScopedPointer",
+        "QWriteLocker",
 
+        // Standard C++
+        "auto_ptr",
+        "unique_ptr",
+
+        // Boost
+        "scoped_array",
+        "scoped_ptr",
+    };
     return knownNames.contains(name);
 }