diff --git a/src/shared/qtsingleapplication/qtlocalpeer.cpp b/src/shared/qtsingleapplication/qtlocalpeer.cpp
index df66d5d7112..eb1beb0315a 100644
--- a/src/shared/qtsingleapplication/qtlocalpeer.cpp
+++ b/src/shared/qtsingleapplication/qtlocalpeer.cpp
@@ -47,12 +47,8 @@ static const char ack[] = "ack";
 
 QString QtLocalPeer::appSessionId(const QString &appId)
 {
-    QByteArray idc = appId.toUtf8();
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
-    quint16 idNum = qChecksum(idc);
-#else
-    quint16 idNum = qChecksum(idc.constData(), idc.size());
-#endif
+    const QByteArray idc = appId.toUtf8();
+    const quint16 idNum = qChecksum(idc);
 
     //### could do: two 16bit checksums over separate halves of id, for a 32bit result - improved uniqeness probability. Every-other-char split would be best.