diff --git a/b_asic/GUI/drag_button.py b/b_asic/GUI/drag_button.py
index 8b406cf1bdf8f4b497c1c0f484fb3c005fb1742e..4753b042f1a2f13b4e16d56fec16a78963780a0c 100644
--- a/b_asic/GUI/drag_button.py
+++ b/b_asic/GUI/drag_button.py
@@ -49,7 +49,7 @@ class DragButton(QPushButton):
         delete.triggered.connect(self.remove)
         menu.exec_(self.cursor().pos())
 
-    def show_properties_window(self):
+    def show_properties_window(self, event):
         self.properties_window = PropertiesWindow(self, self._window)
         self.properties_window.show()