diff --git a/components/lib/column/Column.d.ts b/components/lib/column/Column.d.ts
index d0265887f..093b17694 100755
--- a/components/lib/column/Column.d.ts
+++ b/components/lib/column/Column.d.ts
@@ -948,6 +948,10 @@ export interface ColumnSlots {
      * @param {Object} scope - sort icon slot's params.
      */
     sorticon(scope: {
+        /**
+         * Style class of the sort icon.
+         */
+        class: string;
         /**
          * Current sort state.
          */