diff --git a/packages/core/src/createRenderer.ts b/packages/core/src/createRenderer.ts
index 1eb230e7..cf27d189 100644
--- a/packages/core/src/createRenderer.ts
+++ b/packages/core/src/createRenderer.ts
@@ -1,7 +1,7 @@
 import { autorun, stop } from '@vue/observer'
 import { queueJob } from '@vue/scheduler'
 import { VNodeFlags, ChildrenFlags } from './flags'
-import { EMPTY_OBJ, isReservedProp, lis } from './utils'
+import { EMPTY_OBJ, reservedPropRE, lis } from './utils'
 import {
   VNode,
   MountedVNode,
@@ -382,7 +382,7 @@ export function createRenderer(options: RendererOptions) {
     nextVNode: VNode,
     isSVG: boolean
   ) {
-    if (isReservedProp(key)) {
+    if (reservedPropRE.test(key)) {
       return
     }
     platformPatchData(
diff --git a/packages/core/src/utils.ts b/packages/core/src/utils.ts
index 51eb0ec6..e006fba8 100644
--- a/packages/core/src/utils.ts
+++ b/packages/core/src/utils.ts
@@ -4,9 +4,7 @@ export const NOOP = () => {}
 
 export const onRE = /^on/
 export const nativeOnRE = /^nativeOn/
-
-const reserveRE = /^(?:key|ref|slots)$|^nativeOn/
-export const isReservedProp = (key: string): boolean => reserveRE.test(key)
+export const reservedPropRE = /^(?:key|ref|slots)$|^nativeOn/
 
 export function normalizeStyle(
   value: any