diff --git a/esprima-walk.js b/esprima-walk.js
index df63c73..7432a24 100644
--- a/esprima-walk.js
+++ b/esprima-walk.js
@@ -15,7 +15,7 @@ function walk( ast, fn ) {
 
 			child = node[ key ]
 
-			if ( child instanceof Array ) {
+			if ( child instanceof Array  && key != 'range') {
 
 				for ( j = 0, len = child.length; j < len; j += 1 ) {
 					stack.push( child[ j ] )
@@ -51,13 +51,13 @@ walk.walkAddParent = function ( ast, fn ) {
 				
 				child = node[ key ]
 
-				if ( child instanceof Array ) {
+				if ( child instanceof Array && key != 'range') {
 
 					for ( j = 0, len = child.length; j < len; j += 1 ) {
 
 						subchild = child[ j ]
 
-						if( subchild instanceof Object ) {
+						if( subchild instanceof Object   ) {
 
 							subchild.parent = node
 
diff --git a/package.json b/package.json
index 700d57c..9d7021b 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,8 @@
 	"devDependencies": {
 		"mocha": "~1.19.0",
 		"chai": "~1.9.1",
-		"eslint": "~0.6.2"
+		"eslint": "~0.6.2",
+		"esprima": "~2.7.2"
 	},
 	"scripts": {
 		"test": "node_modules/eslint/bin/eslint.js . && node_modules/mocha/bin/mocha --reporter spec test.js"
diff --git a/test.js b/test.js
index 6b7968d..5e0c850 100644
--- a/test.js
+++ b/test.js
@@ -8,8 +8,64 @@ var expect = require( 'chai' ).expect
 
 var walk = require( './esprima-walk' )
 
-describe( 'esprima-walk', function () {
+var esprima = require('esprima')
+
+var source = 'var i=0;'
+
+
+
+
+
+
+describe('esprima-walk with range', function(){
+	it('should work', function(){
+		var ast = esprima.parse(source, {
+			range: true
+		})
+
+		var types = []
+
+		walk( ast, function ( node ) {
+			types.push( node.type )
+		} )
+
+		var expectedTypes = [ 'Program',
+	  'VariableDeclaration',
+	  'VariableDeclarator',
+	  'Identifier',
+	  'Literal' ]
+
+		expect( types ).to.deep.equal( expectedTypes )
+
+	})
+})
+
+describe('esprima-walkAddParent with range', function(){
+	walk = walk.walkAddParent
+	it('should work', function(){
+		var ast = esprima.parse(source, {
+			range: true
+		})
+
+		var types = []
+
+		walk( ast, function ( node ) {
+			types.push( node.type )
+		} )
+
+		var expectedTypes = [ 'Program',
+	  'VariableDeclaration',
+	  'VariableDeclarator',
+	  'Identifier',
+	  'Literal' ]
+
+		expect( types ).to.deep.equal( expectedTypes )
 
+	})
+})
+
+
+describe( 'esprima-walk', function () {
 
 	it( 'should work', function () {
 		
@@ -68,3 +124,4 @@ describe( 'esprima-walk', function () {
 
 
 } )
+