diff --git a/src/less/core/wrapper/flex.horizontal.less b/src/less/core/wrapper/flex.horizontal.less
index 5ad67aee98..b58fe25c46 100644
--- a/src/less/core/wrapper/flex.horizontal.less
+++ b/src/less/core/wrapper/flex.horizontal.less
@@ -73,7 +73,7 @@
     -o-align-items: center;
     align-items: center;
 
-    &.f-scroll-x {
+    &.f-scroll-y {
       /* 09版 */
       -webkit-box-align: flex-start;
       /* 12版 */