2 files changed, 6 insertions, 1 deletions
diff --git a/components/script/dom/canvasrenderingcontext2d.rs b/components/script/dom/canvasrenderingcontext2d.rs
index 8367e27d05e..d481aca911f 100644
--- a/components/script/dom/canvasrenderingcontext2d.rs
+++ b/components/script/dom/canvasrenderingcontext2d.rs
@@ -160,6 +160,11 @@ impl<'a> CanvasRenderingContext2DMethods for JSRef<'a, CanvasRenderingContext2D>
                                                     Point2D(x as f32, y as f32))).unwrap();
     }
 
+    fn Arc(self, x: f64, y: f64, r: f64, start: f64, end: f64, ccw: bool) {
+        self.renderer.send(CanvasMsg::Arc(Point2D(x as f32, y as f32), r as f32,
+                                          start as f32, end as f32, ccw)).unwrap();
+    }
+
     fn StrokeStyle(self) -> StringOrCanvasGradientOrCanvasPattern {
         // FIXME(pcwalton, #4761): This is not spec-compliant. See:
         //
diff --git a/components/script/dom/webidls/CanvasRenderingContext2D.webidl b/components/script/dom/webidls/CanvasRenderingContext2D.webidl
index 487ce819b25..f9a4c7b68f8 100644
--- a/components/script/dom/webidls/CanvasRenderingContext2D.webidl
+++ b/components/script/dom/webidls/CanvasRenderingContext2D.webidl
@@ -138,7 +138,7 @@ interface CanvasPathMethods {
 
   //void rect(double x, double y, double w, double h);
 
-  //void arc(double x, double y, double radius, double startAngle, double endAngle, optional boolean anticlockwise = false); 
+  void arc(double x, double y, double radius, double startAngle, double endAngle, optional boolean anticlockwise = false);
 // NOT IMPLEMENTED  [LenientFloat] void ellipse(double x, double y, double radiusX, double radiusY, double rotation, double startAngle, double endAngle, boolean anticlockwise);
 };