diff --git a/src/geometries/ParametricGeometry.js b/src/geometries/ParametricGeometry.js
index 329230c4fa40f9452a635249738971c4ca7ccbe6..a55eb2a1603a825e6718a37a3af30922dd9a89e0 100644
--- a/src/geometries/ParametricGeometry.js
+++ b/src/geometries/ParametricGeometry.js
@@ -33,6 +33,16 @@ function ParametricGeometry( func, slices, stacks ) {
 ParametricGeometry.prototype = Object.create( Geometry.prototype );
 ParametricGeometry.prototype.constructor = ParametricGeometry;
 
+ParametricGeometry.prototype.toJSON = function () {
+
+	var data = Geometry.prototype.toJSON.call( this );
+
+	data.func = this.parameters.func.toString();
+
+	return data;
+
+};
+
 // ParametricBufferGeometry
 
 function ParametricBufferGeometry( func, slices, stacks ) {
@@ -159,5 +169,14 @@ function ParametricBufferGeometry( func, slices, stacks ) {
 ParametricBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
 ParametricBufferGeometry.prototype.constructor = ParametricBufferGeometry;
 
+ParametricBufferGeometry.prototype.toJSON = function () {
+
+	var data = BufferGeometry.prototype.toJSON.call( this );
+
+	data.func = this.parameters.func.toString();
+
+	return data;
+
+};
 
 export { ParametricGeometry, ParametricBufferGeometry };
diff --git a/src/loaders/ObjectLoader.js b/src/loaders/ObjectLoader.js
index d2b2afeea56f060b58839a1d20d6996a188b96bf..9d8cb1e588d9dbae211df28bac7e78c105f6577e 100644
--- a/src/loaders/ObjectLoader.js
+++ b/src/loaders/ObjectLoader.js
@@ -408,6 +408,19 @@ ObjectLoader.prototype = Object.assign( Object.create( Loader.prototype ), {
 
 						break;
 
+					case 'ParametricGeometry':
+					case 'ParametricBufferGeometry':
+
+						var func = new Function( 'return ' + data.func )();
+
+						geometry = new Geometries[ data.type ](
+							func,
+							data.slices,
+							data.stacks
+						);
+
+						break;
+
 					case 'BufferGeometry':
 					case 'InstancedBufferGeometry':