diff --git a/android/src/main/java/com/pauldemarco/flutter_blue/FlutterBluePlugin.java b/android/src/main/java/com/pauldemarco/flutter_blue/FlutterBluePlugin.java
index 12a6185a..b4563589 100644
--- a/android/src/main/java/com/pauldemarco/flutter_blue/FlutterBluePlugin.java
+++ b/android/src/main/java/com/pauldemarco/flutter_blue/FlutterBluePlugin.java
@@ -744,6 +744,7 @@ private void startScan(MethodCall call, Result result) {
         try {
             settings = Protos.ScanSettings.newBuilder().mergeFrom(data).build();
             allowDuplicates = settings.getAllowDuplicates();
+            macDeviceScanned.clear();
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                 startScan21(settings);
             } else {