From c54b8908dddd2f2d72188a5d9524c4cdf5f1468a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luk=C3=A1=C5=A1=20Hejl?= <hejl.lukas@gmail.com>
Date: Mon, 17 Jan 2022 12:25:02 +0100
Subject: [PATCH] Follow-up of 878dce1fdf5f52ca8957a1b7fd1f29cb5035f233.

---
 src/libslic3r/GCode/AvoidCrossingPerimeters.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libslic3r/GCode/AvoidCrossingPerimeters.cpp b/src/libslic3r/GCode/AvoidCrossingPerimeters.cpp
index a8a0994f7..f846d8cec 100644
--- a/src/libslic3r/GCode/AvoidCrossingPerimeters.cpp
+++ b/src/libslic3r/GCode/AvoidCrossingPerimeters.cpp
@@ -422,7 +422,7 @@ static Direction get_shortest_direction(const AvoidCrossingPerimeters::Boundary
 }
 
 // Straighten the travel path as long as it does not collide with the contours stored in edge_grid.
-static std::vector<TravelPoint> simplify_travel(const AvoidCrossingPerimeters::Boundary &boundary, std::vector<TravelPoint> &travel)
+static std::vector<TravelPoint> simplify_travel(const AvoidCrossingPerimeters::Boundary &boundary, const std::vector<TravelPoint> &travel)
 {
     FirstIntersectionVisitor visitor(boundary.grid);
     std::vector<TravelPoint> simplified_path;