diff --git a/bi/base.js b/bi/base.js
index b092e206d..418b26bc4 100644
--- a/bi/base.js
+++ b/bi/base.js
@@ -1061,7 +1061,7 @@ BI.ButtonGroup = BI.inherit(BI.Widget, {
     //如果是一个简单的layout
     _isSimpleLayout: function () {
         var o = this.options;
-        return o.layouts.length === 1 && !BI.isArray(o.items[0])
+        return o.layouts.length === 1 && !BI.isArray(o.layouts.items[0])
     },
 
     doBehavior: function () {
diff --git a/docs/base.js b/docs/base.js
index b092e206d..418b26bc4 100644
--- a/docs/base.js
+++ b/docs/base.js
@@ -1061,7 +1061,7 @@ BI.ButtonGroup = BI.inherit(BI.Widget, {
     //如果是一个简单的layout
     _isSimpleLayout: function () {
         var o = this.options;
-        return o.layouts.length === 1 && !BI.isArray(o.items[0])
+        return o.layouts.length === 1 && !BI.isArray(o.layouts.items[0])
     },
 
     doBehavior: function () {
diff --git a/src/base/combination/group.button.js b/src/base/combination/group.button.js
index d303feeeb..22e42c306 100644
--- a/src/base/combination/group.button.js
+++ b/src/base/combination/group.button.js
@@ -117,7 +117,7 @@ BI.ButtonGroup = BI.inherit(BI.Widget, {
     //如果是一个简单的layout
     _isSimpleLayout: function () {
         var o = this.options;
-        return o.layouts.length === 1 && !BI.isArray(o.items[0])
+        return o.layouts.length === 1 && !BI.isArray(o.layouts.items[0])
     },
 
     doBehavior: function () {