diff --git a/src/basic/Matrix.js b/src/basic/Matrix.js
index 42edb6d6..4ca14d59 100644
--- a/src/basic/Matrix.js
+++ b/src/basic/Matrix.js
@@ -54,7 +54,7 @@ var Matrix = Base.extend({
 			this._m10 = this._m01 = this._m02 = this._m12 = 0;
 		}
 		if (!ok)
-			throw Error('Unsupported matrix parameters');
+			throw new Error('Unsupported matrix parameters');
 	},
 
 	/**
diff --git a/src/color/Gradient.js b/src/color/Gradient.js
index 7adb0073..d3cc1619 100644
--- a/src/color/Gradient.js
+++ b/src/color/Gradient.js
@@ -10,7 +10,7 @@ var Gradient = Base.extend({
 	
 	setStops: function(stops) {
 		if (stops.length < 2)
-			throw Error('Gradient stop list needs to contain at least two stops.');
+			throw new Error('Gradient stop list needs to contain at least two stops.');
 		this._stops = stops;
 	}
 });
diff --git a/src/color/RGBColor.js b/src/color/RGBColor.js
index 466ec4b5..70c6fac2 100644
--- a/src/color/RGBColor.js
+++ b/src/color/RGBColor.js
@@ -64,7 +64,8 @@ var RGBColor = Color.extend(new function() {
 
 	function namedToComponents(name) {
 		var hex = namedColors[name];
-		if (!hex) throw Error('The named color "' + name + '" does not exist.');
+		if (!hex)
+			throw new Error('The named color "' + name + '" does not exist.');
 		return hex && hexToComponents(hex);
 	};
 	
diff --git a/src/path/CompoundPath.js b/src/path/CompoundPath.js
index 7cc8138e..16edde23 100644
--- a/src/path/CompoundPath.js
+++ b/src/path/CompoundPath.js
@@ -81,7 +81,7 @@ var CompoundPath = PathItem.extend({
 		if (that.children.length) {
 			return that.children[that.children.length - 1];
 		} else {
-			throw Error('Use a moveTo() command first');
+			throw new Error('Use a moveTo() command first');
 		}
 	}