diff --git a/ORStools/gui/ORStoolsDialog.py b/ORStools/gui/ORStoolsDialog.py
index a2d16aa..7ae6372 100644
--- a/ORStools/gui/ORStoolsDialog.py
+++ b/ORStools/gui/ORStoolsDialog.py
@@ -675,6 +675,7 @@ def _on_linetool_map_doubleclick(self) -> None:
         self.line_tool.doubleClicked.disconnect()
         QApplication.restoreOverrideCursor()
         self._iface.mapCanvas().setMapTool(self.last_maptool)
+        self.line_tool = None
         self.show()
 
     def color_duplicate_items(self, list_widget):