diff --git a/xs/src/libslic3r/MultiPoint.cpp b/xs/src/libslic3r/MultiPoint.cpp
index 0b7f8f3c21..5be53e5da0 100644
--- a/xs/src/libslic3r/MultiPoint.cpp
+++ b/xs/src/libslic3r/MultiPoint.cpp
@@ -74,12 +74,6 @@ 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 08d2b86701..7cf41a8705 100644
--- a/xs/src/libslic3r/MultiPoint.hpp
+++ b/xs/src/libslic3r/MultiPoint.hpp
@@ -29,7 +29,8 @@ 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 e3c7b22620..2a1668950f 100644
--- a/xs/src/libslic3r/Point.cpp
+++ b/xs/src/libslic3r/Point.cpp
@@ -78,12 +78,6 @@ Point::rotate(double angle, const Point &center)
     this->y = (coord_t)round( (double)center.y + c * dy + s * dx );
 }
 
-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 45331aa714..9c23252cb6 100644
--- a/xs/src/libslic3r/Point.hpp
+++ b/xs/src/libslic3r/Point.hpp
@@ -44,7 +44,7 @@ class Point
     void translate(const Vector &vector);
     void rotate(double angle);
     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;