diff --git a/src/Classes/Project.gd b/src/Classes/Project.gd
index 792213613..912ecc255 100644
--- a/src/Classes/Project.gd
+++ b/src/Classes/Project.gd
@@ -425,10 +425,10 @@ func deserialize(dict: Dictionary) -> void:
 	if dict.has("symmetry_points"):
 		x_symmetry_point = dict.symmetry_points[0]
 		y_symmetry_point = dict.symmetry_points[1]
-		for point in x_symmetry_axis.points:
-			point.y = floor(y_symmetry_point / 2 + 1)
-		for point in y_symmetry_axis.points:
-			point.x = floor(x_symmetry_point / 2 + 1)
+		for point in x_symmetry_axis.points.size():
+			x_symmetry_axis.points[point].y = floor(y_symmetry_point / 2 + 1)
+		for point in y_symmetry_axis.points.size():
+			y_symmetry_axis.points[point].x = floor(x_symmetry_point / 2 + 1)
 	if dict.has("export_directory_path"):
 		directory_path = dict.export_directory_path
 	if dict.has("export_file_name"):