diff --git a/src/libslic3r/MultiPoint.hpp b/src/libslic3r/MultiPoint.hpp
index d17142bb2..46b47832a 100644
--- a/src/libslic3r/MultiPoint.hpp
+++ b/src/libslic3r/MultiPoint.hpp
@@ -84,6 +84,13 @@ public:
 
     static Points _douglas_peucker(const Points &points, const double tolerance);
     static Points visivalingam(const Points& pts, const double& tolerance);
+
+    inline auto begin()        { return points.begin(); }
+    inline auto begin()  const { return points.begin(); }
+    inline auto end()          { return points.end();   }
+    inline auto end()    const { return points.end();   }
+    inline auto cbegin() const { return points.begin(); }
+    inline auto cend()   const { return points.end();   }
 };
 
 class MultiPoint3
diff --git a/src/libslic3r/Polygon.hpp b/src/libslic3r/Polygon.hpp
index 01d4d3dec..93cd70121 100644
--- a/src/libslic3r/Polygon.hpp
+++ b/src/libslic3r/Polygon.hpp
@@ -75,13 +75,6 @@ public:
 
     using iterator = Points::iterator;
     using const_iterator = Points::const_iterator;
-
-    inline auto begin()        { return points.begin(); }
-    inline auto begin()  const { return points.begin(); }
-    inline auto end()          { return points.end();   }
-    inline auto end()    const { return points.end();   }
-    inline auto cbegin() const { return points.begin(); }
-    inline auto cend()   const { return points.end();   }
 };
 
 inline bool operator==(const Polygon &lhs, const Polygon &rhs) { return lhs.points == rhs.points; }