diff --git a/src/point.rs b/src/point.rs
index 75746b4..8d4213c 100644
--- a/src/point.rs
+++ b/src/point.rs
@@ -8,6 +8,7 @@
 // except according to those terms.
 
 use length::Length;
+use size::Size2D;
 
 use std::fmt;
 use std::num::Zero;
@@ -45,6 +46,12 @@ impl<T:Clone + Add<T,T>> Add<Point2D<T>, Point2D<T>> for Point2D<T> {
     }
 }
 
+impl<T: Add<T, T>> Point2D<T> {
+    pub fn add_size(&self, other: &Size2D<T>) -> Point2D<T> {
+        Point2D { x: self.x + other.width, y: self.y + other.height }
+    }
+}
+
 impl<T:Clone + Sub<T,T>> Sub<Point2D<T>, Point2D<T>> for Point2D<T> {
     fn sub(&self, other: &Point2D<T>) -> Point2D<T> {
         Point2D(self.x - other.x, self.y - other.y)