diff --git a/src/item/Shape.js b/src/item/Shape.js
index 711394e5..22d70f32 100644
--- a/src/item/Shape.js
+++ b/src/item/Shape.js
@@ -437,7 +437,7 @@ statics: new function() {
 		Ellipse: function(/* rectangle */) {
 			var center,
 				radius;
-			if (Base.hasNamed(arguments, 'center')) {
+			if (Base.hasNamed(arguments, 'radius')) {
 				center = Point.readNamed(arguments, 'center');
 				radius = Size.readNamed(arguments, 'radius');
 			} else {
diff --git a/src/path/Path.Constructors.js b/src/path/Path.Constructors.js
index 26a6092b..c20be35f 100644
--- a/src/path/Path.Constructors.js
+++ b/src/path/Path.Constructors.js
@@ -284,7 +284,7 @@ Path.inject({ statics: new function() {
 		Ellipse: function(/* rectangle */) {
 			var center,
 				radius;
-			if (Base.hasNamed(arguments, 'center')) {
+			if (Base.hasNamed(arguments, 'radius')) {
 				center = Point.readNamed(arguments, 'center');
 				radius = Size.readNamed(arguments, 'radius');
 			} else {