diff --git a/components/_util/easings.ts b/components/_util/easings.ts
index 8831e9187d..a71ac8f22e 100644
--- a/components/_util/easings.ts
+++ b/components/_util/easings.ts
@@ -1,4 +1,4 @@
-function easeInOutCubic(t: number, b: number, c: number, d: number) {
+export function easeInOutCubic(t: number, b: number, c: number, d: number) {
   const cc = c - b;
   t /= d / 2;
   if (t < 1) {
@@ -6,5 +6,3 @@ function easeInOutCubic(t: number, b: number, c: number, d: number) {
   }
   return (cc / 2) * ((t -= 2) * t * t + 2) + b;
 }
-
-export { easeInOutCubic };