diff --git a/packages/kit/src/exports/public.d.ts b/packages/kit/src/exports/public.d.ts
index 60a50033add7..1a0935524bee 100644
--- a/packages/kit/src/exports/public.d.ts
+++ b/packages/kit/src/exports/public.d.ts
@@ -52,7 +52,7 @@ export interface Adapter {
 	supports?: {
 		/**
 		 * Test support for `read` from `$app/server`.
-		 * @param details.config The merged route config
+		 * @param details.config The merged adapter-specific route config exported from the route with `export const config`
 		 */
 		read?: (details: { config: any; route: { id: string } }) => boolean;
 
diff --git a/packages/kit/types/index.d.ts b/packages/kit/types/index.d.ts
index 2d75e5ab0ab7..f4365679bd68 100644
--- a/packages/kit/types/index.d.ts
+++ b/packages/kit/types/index.d.ts
@@ -27,7 +27,7 @@ declare module '@sveltejs/kit' {
 		supports?: {
 			/**
 			 * Test support for `read` from `$app/server`.
-			 * @param details.config The merged route config
+			 * @param details.config The merged adapter-specific route config exported from the route with `export const config`
 			 */
 			read?: (details: { config: any; route: { id: string } }) => boolean;