diff --git a/src/utils/area_selection.py b/src/utils/area_selection.py
index d451c11..aa4d58b 100644
--- a/src/utils/area_selection.py
+++ b/src/utils/area_selection.py
@@ -183,6 +183,13 @@ class AreaSelectionHandler:
 
     def toggle_selection_inversion(self) -> bool:
         """Invert the current active selection."""
+        # Auto-complete polygon selection if user right-clicks after plotting points
+        if (self._selectionType == "polygon"
+                and self._selectionArea
+                and not self._selectionArea.is_active
+                and len(self._polygonPath) >= 3):
+            self._complete_polygon_selection()
+
         if not self._selectionArea or not self._selectionArea.is_active:
             return False
         if not self._selectionArea.is_valid():