diff --git a/packages/reactivity/src/collectionHandlers.ts b/packages/reactivity/src/collectionHandlers.ts
index 1d07af3be8c..a96cf0db8a9 100644
--- a/packages/reactivity/src/collectionHandlers.ts
+++ b/packages/reactivity/src/collectionHandlers.ts
@@ -331,6 +331,7 @@ const [
   shallowReadonlyInstrumentations
 ] = /* #__PURE__*/ createInstrumentations()
 
+/*! #__NO_SIDE_EFFECTS__ */
 function createInstrumentationGetter(isReadonly: boolean, shallow: boolean) {
   const instrumentations = shallow
     ? isReadonly
diff --git a/packages/runtime-core/src/devtools.ts b/packages/runtime-core/src/devtools.ts
index bf67093f5c3..ba8c40fe012 100644
--- a/packages/runtime-core/src/devtools.ts
+++ b/packages/runtime-core/src/devtools.ts
@@ -123,6 +123,7 @@ export const devtoolsComponentRemoved = (
   }
 }
 
+/*! #__NO_SIDE_EFFECTS__ */
 function createDevtoolsComponentHook(hook: DevtoolsHooks) {
   return (component: ComponentInternalInstance) => {
     emit(
diff --git a/packages/server-renderer/src/helpers/ssrRenderAttrs.ts b/packages/server-renderer/src/helpers/ssrRenderAttrs.ts
index 6bbf83a1eaa..c93efa13608 100644
--- a/packages/server-renderer/src/helpers/ssrRenderAttrs.ts
+++ b/packages/server-renderer/src/helpers/ssrRenderAttrs.ts
@@ -12,7 +12,7 @@ import {
 } from '@vue/shared'
 
 // leading comma for empty string ""
-const shouldIgnoreProp = makeMap(
+const shouldIgnoreProp = /*#__PURE__*/ makeMap(
   `,key,ref,innerHTML,textContent,ref_key,ref_for`
 )
 
diff --git a/packages/shared/src/makeMap.ts b/packages/shared/src/makeMap.ts
index b598704c673..e49b1bf3d36 100644
--- a/packages/shared/src/makeMap.ts
+++ b/packages/shared/src/makeMap.ts
@@ -5,6 +5,8 @@
  * \/\*#\_\_PURE\_\_\*\/
  * So that rollup can tree-shake them if necessary.
  */
+
+/*! #__NO_SIDE_EFFECTS__ */
 export function makeMap(
   str: string,
   expectsLowerCase?: boolean