diff --git a/syncthingconnector/syncthingprocess.cpp b/syncthingconnector/syncthingprocess.cpp
index 9feaecd6..12405f13 100644
--- a/syncthingconnector/syncthingprocess.cpp
+++ b/syncthingconnector/syncthingprocess.cpp
@@ -724,7 +724,11 @@ void SyncthingProcess::handleLeftoverProcesses()
 #endif
 }
 
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
 bool SyncthingProcess::nativeEventFilter(const QByteArray &eventType, void *message, qintptr *result)
+#else
+bool SyncthingProcess::nativeEventFilter(const QByteArray &eventType, void *message, long *result)
+#endif
 {
     Q_UNUSED(result)
 #ifdef Q_OS_WINDOWS
diff --git a/syncthingconnector/syncthingprocess.h b/syncthingconnector/syncthingprocess.h
index cdbd3244..c90ed2be 100644
--- a/syncthingconnector/syncthingprocess.h
+++ b/syncthingconnector/syncthingprocess.h
@@ -116,7 +116,11 @@ private Q_SLOTS:
 #endif
 
 private:
+#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
 
     QString m_program;
     QStringList m_arguments;