diff --git a/src/libslic3r/Arachne/utils/ExtrusionLine.cpp b/src/libslic3r/Arachne/utils/ExtrusionLine.cpp
index 958fbf3d1..878beb406 100644
--- a/src/libslic3r/Arachne/utils/ExtrusionLine.cpp
+++ b/src/libslic3r/Arachne/utils/ExtrusionLine.cpp
@@ -11,12 +11,12 @@ namespace Slic3r::Arachne
 
 ExtrusionLine::ExtrusionLine(const size_t inset_idx, const bool is_odd) : inset_idx(inset_idx), is_odd(is_odd), is_closed(false) {}
 
-coord_t ExtrusionLine::getLength() const
+int64_t ExtrusionLine::getLength() const
 {
     if (junctions.empty())
         return 0;
 
-    coord_t           len  = 0;
+    int64_t           len  = 0;
     ExtrusionJunction prev = junctions.front();
     for (const ExtrusionJunction &next : junctions) {
         len += (next.p - prev.p).cast<int64_t>().norm();
diff --git a/src/libslic3r/Arachne/utils/ExtrusionLine.hpp b/src/libslic3r/Arachne/utils/ExtrusionLine.hpp
index def0304c0..07d8d41a2 100644
--- a/src/libslic3r/Arachne/utils/ExtrusionLine.hpp
+++ b/src/libslic3r/Arachne/utils/ExtrusionLine.hpp
@@ -8,7 +8,7 @@
 #include "ExtrusionJunction.hpp"
 #include "../../Polyline.hpp"
 #include "../../Polygon.hpp"
-#include "BoundingBox.hpp"
+#include "../../BoundingBox.hpp"
 
 namespace Slic3r {
 class ThickPolyline;
@@ -116,8 +116,8 @@ struct ExtrusionLine
     /*!
      * Sum the total length of this path.
      */
-    coord_t getLength() const;
-    coord_t polylineLength() const { return getLength(); }
+    int64_t getLength() const;
+    int64_t polylineLength() const { return getLength(); }
 
     /*!
      * Put all junction locations into a polygon object.
diff --git a/src/libslic3r/Arachne/utils/PolylineStitcher.hpp b/src/libslic3r/Arachne/utils/PolylineStitcher.hpp
index 6892c3c81..14bdec0d4 100644
--- a/src/libslic3r/Arachne/utils/PolylineStitcher.hpp
+++ b/src/libslic3r/Arachne/utils/PolylineStitcher.hpp
@@ -85,7 +85,7 @@ public:
                 { // try extending chain in the other direction
                     chain.reverse();
                 }
-                coord_t chain_length = chain.polylineLength();
+                int64_t chain_length = chain.polylineLength();
 
                 while (true)
                 {