diff --git a/app/musicmuster.py b/app/musicmuster.py
index dd94fbc..0a2eb13 100755
--- a/app/musicmuster.py
+++ b/app/musicmuster.py
@@ -1262,6 +1262,7 @@ class Window(QMainWindow, Ui_MainWindow):
             self.preview_player.stop()
             self.label_intro_timer.setText("0.0")
             self.btnPreviewMark.setEnabled(False)
+            self.btnPreviewArm.setChecked(False)
 
     def preview_arm(self):
         """Manager arm button for setting intro length"""