diff --git a/src/blackmisc/aviation/airlineicaocode.cpp b/src/blackmisc/aviation/airlineicaocode.cpp
index 7c53f2416..93256ebc2 100644
--- a/src/blackmisc/aviation/airlineicaocode.cpp
+++ b/src/blackmisc/aviation/airlineicaocode.cpp
@@ -475,7 +475,7 @@ namespace BlackMisc
                 ok = fn.size() > 5;
                 if (!ok) { continue; }
                 BLACK_VERIFY_X(ok, Q_FUNC_INFO, "wrong file name");
-                const int id = fn.left(5).toInt(&ok);
+                const int id = fn.leftRef(5).toInt(&ok);
                 BLACK_VERIFY_X(ok, Q_FUNC_INFO, "wrong id format");
                 if (!ok) { continue; }
                 ids.insert(id);
diff --git a/src/blackmisc/propertyindex.cpp b/src/blackmisc/propertyindex.cpp
index e3a4ef945..dc85abb98 100644
--- a/src/blackmisc/propertyindex.cpp
+++ b/src/blackmisc/propertyindex.cpp
@@ -74,7 +74,7 @@ namespace BlackMisc
     {
         m_indexes.clear();
         if (indexes.isEmpty()) { return; }
-        for (const QString &index : indexes.split(';'))
+        for (const QStringRef &index : indexes.splitRef(';'))
         {
             if (index.isEmpty()) { continue; }
             bool ok;