diff --git a/xs/src/libslic3r/MultiPoint.cpp b/xs/src/libslic3r/MultiPoint.cpp
index 6857d6393e..62b05a9b9f 100644
--- a/xs/src/libslic3r/MultiPoint.cpp
+++ b/xs/src/libslic3r/MultiPoint.cpp
@@ -61,12 +61,6 @@ MultiPoint::length() const
     return len;
 }
 
-bool
-MultiPoint::is_valid() const
-{
-    return this->points.size() >= 2;
-}
-
 int
 MultiPoint::find_point(const Point &point) const
 {
diff --git a/xs/src/libslic3r/MultiPoint.hpp b/xs/src/libslic3r/MultiPoint.hpp
index b83f233684..1f0eb489fd 100644
--- a/xs/src/libslic3r/MultiPoint.hpp
+++ b/xs/src/libslic3r/MultiPoint.hpp
@@ -28,7 +28,8 @@ class MultiPoint
     virtual Point last_point() const = 0;
     virtual Lines lines() const = 0;
     double length() const;
-    bool is_valid() const;
+    bool is_valid() const { return this->points.size() >= 2; }
+
     int find_point(const Point &point) const;
     bool has_boundary_point(const Point &point) const;
     BoundingBox bounding_box() const;
diff --git a/xs/src/libslic3r/Point.cpp b/xs/src/libslic3r/Point.cpp
index 29ce0b1532..07462a351a 100644
--- a/xs/src/libslic3r/Point.cpp
+++ b/xs/src/libslic3r/Point.cpp
@@ -63,12 +63,6 @@ Point::rotate(double angle, const Point &center)
     this->y = (coord_t)round( (double)center.y + cos(angle) * (cur_y - (double)center.y) + sin(angle) * (cur_x - (double)center.x) );
 }
 
-bool
-Point::coincides_with(const Point &point) const
-{
-    return this->x == point.x && this->y == point.y;
-}
-
 bool
 Point::coincides_with_epsilon(const Point &point) const
 {
diff --git a/xs/src/libslic3r/Point.hpp b/xs/src/libslic3r/Point.hpp
index 6638e0eb3f..8fe2ded7e6 100644
--- a/xs/src/libslic3r/Point.hpp
+++ b/xs/src/libslic3r/Point.hpp
@@ -43,7 +43,7 @@ class Point
     void translate(double x, double y);
     void translate(const Vector &vector);
     void rotate(double angle, const Point &center);
-    bool coincides_with(const Point &point) const;
+    bool coincides_with(const Point &point) const { return this->x == point.x && this->y == point.y; }
     bool coincides_with_epsilon(const Point &point) const;
     int nearest_point_index(const Points &points) const;
     int nearest_point_index(const PointConstPtrs &points) const;