diff --git a/index.js b/index.js
index 7820e64..7fd75ce 100644
--- a/index.js
+++ b/index.js
@@ -190,7 +190,7 @@ var compile = function(schema, cache, root, reporter, opts) {
         validate('for (var %s = %d; %s < %s.length; %s++) {', i, node.items.length, i, name, i)
         visit(name+'['+i+']', node.additionalItems, reporter, filter)
         validate('}')
-      }   
+      }
     }
 
     if (node.format && fmts[node.format]) {
@@ -395,7 +395,7 @@ var compile = function(schema, cache, root, reporter, opts) {
       node.anyOf.forEach(function(sch, i) {
         if (i === 0) {
           validate('var %s = errors', prev)
-        } else {          
+        } else {
           validate('if (errors !== %s) {', prev)
             ('errors = %s', prev)
         }
@@ -446,7 +446,7 @@ var compile = function(schema, cache, root, reporter, opts) {
 
     if (node.maxProperties !== undefined) {
       if (type !== 'object') validate('if (%s) {', types.object(name))
-      
+
       validate('if (Object.keys(%s).length > %d) {', name, node.maxProperties)
       error('has more properties than allowed')
       validate('}')
@@ -456,7 +456,7 @@ var compile = function(schema, cache, root, reporter, opts) {
 
     if (node.minProperties !== undefined) {
       if (type !== 'object') validate('if (%s) {', types.object(name))
-      
+
       validate('if (Object.keys(%s).length < %d) {', name, node.minProperties)
       error('has less properties than allowed')
       validate('}')
@@ -466,7 +466,7 @@ var compile = function(schema, cache, root, reporter, opts) {
 
     if (node.maxItems !== undefined) {
       if (type !== 'array') validate('if (%s) {', types.array(name))
-      
+
       validate('if (%s.length > %d) {', name, node.maxItems)
       error('has more items than allowed')
       validate('}')
@@ -476,7 +476,7 @@ var compile = function(schema, cache, root, reporter, opts) {
 
     if (node.minItems !== undefined) {
       if (type !== 'array') validate('if (%s) {', types.array(name))
-      
+
       validate('if (%s.length < %d) {', name, node.minItems)
       error('has less items than allowed')
       validate('}')
@@ -543,13 +543,14 @@ var compile = function(schema, cache, root, reporter, opts) {
   validate = validate.toFunction(scope)
   validate.errors = null
 
-  validate.__defineGetter__('error', function() {
-    if (!validate.errors) return ''
-    return validate.errors
-      .map(function(err) {
-        return err.field+' '+err.message
-      })
-      .join('\n')
+  Object.defineProperty(validate, 'error', {
+    get: function() {
+      if (!validate.errors)
+        return '';
+      return validate.errors.map(function(err) {
+        return err.field + ' ' + err.message;
+      }).join('\n');
+    }
   })
 
   validate.toJSON = function() {