diff --git a/src/ui/mixins/pdf_viewer.py b/src/ui/mixins/pdf_viewer.py
index e1d7abb..eb1ac47 100644
--- a/src/ui/mixins/pdf_viewer.py
+++ b/src/ui/mixins/pdf_viewer.py
@@ -507,6 +507,7 @@ class PdfViewerMixin:
         self.current_new_pdf_path = None
         self.ui.view_ref_pdf.setEnabled(False)
         self.ui.view_new_pdf.setEnabled(False)
+        self.ui.accept_changes.setEnabled(False)
 
         # Slider deaktivieren
         self.ui.alpha.setEnabled(False)