diff --git a/src/directives/public/for.js b/src/directives/public/for.js
index 4efad312205..a84bba8c62f 100644
--- a/src/directives/public/for.js
+++ b/src/directives/public/for.js
@@ -485,7 +485,6 @@ module.exports = {
    */
 
   _postProcess: function (value) {
-    this.processedValue = value
     if (_.isArray(value)) {
       return value
     } else if (_.isPlainObject(value)) {
@@ -523,25 +522,9 @@ module.exports = {
         frag.destroy()
       }
     }
-  },
-
-  _syncChanges: function (scope, value) {
-    // two-way sync for v-for alias
-    var subjectValue = this.filters ? this.processedValue
-      : this.rawValue
-    if (scope.$key) { // original is an object
-      subjectValue[scope.$key] = value
-    } else {
-      subjectValue.$set(scope.$index, value)
-    }
-    if (this.filters) {
-      var vm = this._scope || this.vm
-      var reverseValue = vm._applyFilters(subjectValue,
-        subjectValue, this.filters, true)
-      vm.$set(this.expression, reverseValue)
-    }
   }
 }
+
 /**
  * Helper to find the previous element that is a fragment
  * anchor. This is necessary because a destroyed frag's
diff --git a/src/instance/misc.js b/src/instance/misc.js
index c5db2475c32..7eee2e717f4 100644
--- a/src/instance/misc.js
+++ b/src/instance/misc.js
@@ -39,17 +39,6 @@ exports._applyFilters = function (value, oldValue, filters, write) {
   return value
 }
 
-exports._syncChanges = function (value, expression) {
-  // two-way sync for v-for alias
-  var forContext = this.$forContext
-  if (forContext && forContext.alias === expression) {
-    var self = this
-    forContext._withLock(function () {
-      forContext._syncChanges(self, value)
-    })
-  }
-}
-
 /**
  * Resolve a component, depending on whether the component
  * is defined normally or using an async factory function.
diff --git a/src/watcher.js b/src/watcher.js
index 6977c5d8d2c..0adfcc3c850 100644
--- a/src/watcher.js
+++ b/src/watcher.js
@@ -143,7 +143,27 @@ Watcher.prototype.set = function (value) {
       )
     }
   }
-  scope._syncChanges(value, this.expression)
+  // two-way sync for v-for alias
+  var forContext = scope.$forContext
+  if (forContext && forContext.alias === this.expression) {
+    if (forContext.filters) {
+      process.env.NODE_ENV !== 'production' && _.warn(
+        'It seems you are using two-way binding on ' +
+        'a v-for alias (' + this.expression + '), and the ' +
+        'v-for has filters. This will not work properly. ' +
+        'Either remove the filters or use an array of ' +
+        'objects and bind to object properties instead.'
+      )
+      return
+    }
+    forContext._withLock(function () {
+      if (scope.$key) { // original is an object
+        forContext.rawValue[scope.$key] = value
+      } else {
+        forContext.rawValue.$set(scope.$index, value)
+      }
+    })
+  }
 }
 
 /**
diff --git a/test/unit/specs/directives/public/for/for_spec.js b/test/unit/specs/directives/public/for/for_spec.js
index 681cfd1e7c6..a9f80545eed 100644
--- a/test/unit/specs/directives/public/for/for_spec.js
+++ b/test/unit/specs/directives/public/for/for_spec.js
@@ -730,32 +730,19 @@ if (_.inBrowser) {
       }
     })
 
-    it('v-model on alias with filters', function (done) {
+    it('warn v-model on alias with filters', function () {
       var vm = new Vue({
         el: el,
         template:
-          '<div v-for="item in items | filter">' +
-            '<input v-model="item">{{item}}' +
+          '<div v-for="item in items | orderBy \'item\'">' +
+            '<input v-model="item">' +
           '</div>',
         data: {
-          items: 'a, b'
-        },
-        filters: {
-          filter: {
-            read: function (value) { return value.split(', ') },
-            write: function (value) {
-              return value.join(', ')
-            }
-          }
+          items: ['a', 'b']
         }
       })
-      var input = vm.$el.querySelector('input')
-      input.value = 'c'
-      trigger(input, 'input')
-      _.nextTick(function () {
-        expect(vm.items).toBe('c, b')
-        done()
-      })
+      trigger(vm.$el.querySelector('input'), 'input')
+      expect(hasWarned(_, 'It seems you are using two-way binding')).toBe(true)
     })
 
     it('nested track by', function (done) {