diff --git a/src/path/Path.js b/src/path/Path.js
index a628ab77..01220ff4 100644
--- a/src/path/Path.js
+++ b/src/path/Path.js
@@ -2486,6 +2486,7 @@ var Path = PathItem.extend(/** @lends Path# */{
 			this.quadraticCurveTo(current.add(handle), current.add(to));
 		},
 
+		// TODO: Implement version for: (to, radius, rotation, clockwise, large)
 		arcBy: function(/* to, clockwise | through, to */) {
 			var current = getCurrentSegment(this)._point,
 				point = current.add(Point.read(arguments)),
diff --git a/src/path/PathItem.js b/src/path/PathItem.js
index 1f963e87..d5251603 100644
--- a/src/path/PathItem.js
+++ b/src/path/PathItem.js
@@ -555,6 +555,7 @@ var PathItem = Item.extend(/** @lends PathItem# */{
 	 * 	myPath.arcTo(event.point);
 	 * }
 	 */
+	// DOCS: PathItem#arcTo(to, radius, rotation, clockwise, large)
 
 	/**
 	 * Closes the path. When closed, Paper.js connects the first and last