diff --git a/src/widget/yearmonth/combo.yearmonth.js b/src/widget/yearmonth/combo.yearmonth.js
index 79a9482f9..427a6b189 100644
--- a/src/widget/yearmonth/combo.yearmonth.js
+++ b/src/widget/yearmonth/combo.yearmonth.js
@@ -59,7 +59,7 @@ BI.DynamicYearMonthCombo = BI.inherit(BI.Single, {
 
         this.combo = BI.createWidget({
             type: "bi.combo",
-            cls: 'bi-border bi-border-radius bi-focus-shadow',
+            cls: "bi-border bi-border-radius bi-focus-shadow",
             container: o.container,
             isNeedAdjustHeight: o.isNeedAdjustHeight,
             isNeedAdjustWidth: o.isNeedAdjustWidth,
diff --git a/src/widget/yearquarter/combo.yearquarter.js b/src/widget/yearquarter/combo.yearquarter.js
index 28d1ac5c0..7cb1cd80d 100644
--- a/src/widget/yearquarter/combo.yearquarter.js
+++ b/src/widget/yearquarter/combo.yearquarter.js
@@ -59,7 +59,7 @@ BI.DynamicYearQuarterCombo = BI.inherit(BI.Widget, {
 
         this.combo = BI.createWidget({
             type: "bi.combo",
-            cls: 'bi-border bi-border-radius bi-focus-shadow',
+            cls: "bi-border bi-border-radius bi-focus-shadow",
             container: o.container,
             isNeedAdjustHeight: o.isNeedAdjustHeight,
             isNeedAdjustWidth: o.isNeedAdjustWidth,