diff --git a/src/components/layout/content.vue b/src/components/layout/content.vue
index 03caad3..7691d26 100644
--- a/src/components/layout/content.vue
+++ b/src/components/layout/content.vue
@@ -5,11 +5,6 @@
     const prefixCls = 'ivu-layout';
     export default {
         name: 'Content',
-        data () {
-            return {
-                prefixCls: prefixCls
-            };
-        },
         computed: {
             wrapClasses () {
                 return `${prefixCls}-content`;
diff --git a/src/components/layout/footer.vue b/src/components/layout/footer.vue
index 2bc5322..cf47ba6 100644
--- a/src/components/layout/footer.vue
+++ b/src/components/layout/footer.vue
@@ -5,11 +5,6 @@
     const prefixCls = 'ivu-layout';
     export default {
         name: 'Footer',
-        data () {
-            return {
-                prefixCls: prefixCls
-            };
-        },
         computed: {
             wrapClasses () {
                 return `${prefixCls}-footer`;
diff --git a/src/components/layout/header.vue b/src/components/layout/header.vue
index 2ca4dd2..da2acc1 100644
--- a/src/components/layout/header.vue
+++ b/src/components/layout/header.vue
@@ -5,11 +5,6 @@
     const prefixCls = 'ivu-layout';
     export default {
         name: 'Header',
-        data () {
-            return {
-                prefixCls: prefixCls
-            };
-        },
         computed: {
             wrapClasses () {
                 return `${prefixCls}-header`;
diff --git a/src/components/layout/layout.vue b/src/components/layout/layout.vue
index 55a454c..768011a 100644
--- a/src/components/layout/layout.vue
+++ b/src/components/layout/layout.vue
@@ -8,7 +8,6 @@
         name: 'Layout',
         data () {
             return {
-                prefixCls: prefixCls,
                 hasSider: false
             };
         },
--
libgit2 0.21.4