diff --git a/editor/plugins/tile_set_editor_plugin.cpp b/editor/plugins/tile_set_editor_plugin.cpp
index 5b54384ee05..dc099b84a7c 100644
--- a/editor/plugins/tile_set_editor_plugin.cpp
+++ b/editor/plugins/tile_set_editor_plugin.cpp
@@ -2460,10 +2460,12 @@ void TileSetEditor::draw_polygon_shapes() {
 					workspace->draw_polygon(polygon, colors);
 
 					if (!creating_shape) {
-						for (int j = 0; j < polygon.size() - 1; j++) {
-							workspace->draw_line(polygon[j], polygon[j + 1], c_border, 1, true);
+						if (polygon.size() > 1) {
+							for (int j = 0; j < polygon.size() - 1; j++) {
+								workspace->draw_line(polygon[j], polygon[j + 1], c_border, 1, true);
+							}
+							workspace->draw_line(polygon[polygon.size() - 1], polygon[0], c_border, 1, true);
 						}
-						workspace->draw_line(polygon[polygon.size() - 1], polygon[0], c_border, 1, true);
 					}
 					if (shape == edited_occlusion_shape) {
 						draw_handles = true;