diff --git a/src/testlib/qbenchmarkevent.cpp b/src/testlib/qbenchmarkevent.cpp
index 5a895106a22..36ec1dc91ca 100644
--- a/src/testlib/qbenchmarkevent.cpp
+++ b/src/testlib/qbenchmarkevent.cpp
@@ -45,11 +45,7 @@ int QBenchmarkEvent::adjustMedianCount(int suggestion)
 }
 
 // This could be done in a much better way, this is just the beginning.
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 bool QBenchmarkEvent::nativeEventFilter(const QByteArray &eventType, void *message, qintptr *result)
-#else
-bool QBenchmarkEvent::nativeEventFilter(const QByteArray &eventType, void *message, long *result)
-#endif
 {
     Q_UNUSED(eventType);
     Q_UNUSED(message);
diff --git a/src/testlib/qbenchmarkevent_p.h b/src/testlib/qbenchmarkevent_p.h
index 7e997e77793..bd6a48d44dd 100644
--- a/src/testlib/qbenchmarkevent_p.h
+++ b/src/testlib/qbenchmarkevent_p.h
@@ -32,11 +32,7 @@ public:
     bool isMeasurementAccepted(Measurement measurement) override;
     int adjustIterationCount(int suggestion) override;
     int adjustMedianCount(int suggestion) override;
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     bool nativeEventFilter(const QByteArray &eventType, void *message, qintptr *result) override;
-#else
-    bool nativeEventFilter(const QByteArray &eventType, void *message, long *result) override;
-#endif
     qint64 eventCounter = 0;
 };