diff --git a/packages/next/shared/lib/image-loader.ts b/packages/next/shared/lib/image-loader.ts
index ef9d5b6cba90c..a25c6278805d7 100644
--- a/packages/next/shared/lib/image-loader.ts
+++ b/packages/next/shared/lib/image-loader.ts
@@ -1,5 +1,13 @@
-// TODO: change "any" to actual type
-function defaultLoader({ config, src, width, quality }: any): string {
+import { ImageConfigComplete } from './image-config'
+
+type DefaultLoaderData = {
+  config: ImageConfigComplete
+  src: string
+  width: number
+  quality?: number
+}
+
+function defaultLoader({ config, src, width, quality }: DefaultLoaderData): string {
   if (process.env.NODE_ENV !== 'production') {
     const missingValues = []