diff --git a/oscar/main.cpp b/oscar/main.cpp
index ce3477b0..b6723b28 100644
--- a/oscar/main.cpp
+++ b/oscar/main.cpp
@@ -457,7 +457,11 @@ int main(int argc, char *argv[]) {
     qDebug() << "Using " + GetAppData() + " as OSCAR data folder";
 
     QDir newDir(GetAppData());
-    if ( ! newDir.exists() || newDir.isEmpty() ) {                      // directoy doesn't exist yet or is empty, try to migrate old data
+#if QT_VERSION < QT_VERSION_CHECK(5,9,0)
+    if ( ! newDir.exists() || newDir.count() == 0 ) {     // directoy doesn't exist yet or is empty, try to migrate old data
+#else
+    if ( ! newDir.exists() || newDir.isEmpty() ) {        // directoy doesn't exist yet or is empty, try to migrate old data
+#endif
         if (QMessageBox::question(nullptr, QObject::tr("Migrate SleepyHead Data?"),
                                   QObject::tr("On the next screen OSCAR will ask you to select a folder with SleepyHead data") +"\n" +
                                   QObject::tr("Click [OK] to go to the next screen or [No] if you do not wish to use any SleepyHead data."),