diff --git a/components/style/color/bezierEasing.less b/components/style/color/bezierEasing.less
index bcad6c1dcd..16618be52d 100644
--- a/components/style/color/bezierEasing.less
+++ b/components/style/color/bezierEasing.less
@@ -100,6 +100,8 @@
   };
 
   this.colorEasing = BezierEasing(0.26, 0.09, 0.37, 0.18);
+  // less 3 requires a return
+  return '';
 })()`;
 }
 // It is hacky way to make this function will be compiled preferentially by less