diff --git a/mod.ts b/mod.ts
index 6b77c12..867c042 100644
--- a/mod.ts
+++ b/mod.ts
@@ -16,4 +16,4 @@ export {
   BytesRange,
   type ComputeBoundary,
 } from "./ranges/bytes.ts";
-export type { Range, RangeContext, RangeRespond } from "./types.ts";
+export type { Range, RangeContext } from "./types.ts";
diff --git a/types.ts b/types.ts
index 0108f4d..63ee3a7 100644
--- a/types.ts
+++ b/types.ts
@@ -9,12 +9,7 @@ export interface Range {
   readonly rangeUnit: string;
 
   /** Takes the context of a range request and handler response and return a partial response. */
-  readonly respond: RangeRespond;
-}
-
-/** Range responding API. */
-export interface RangeRespond {
-  (context: RangeContext): Response | Promise<Response>;
+  respond(context: RangeContext): Response | Promise<Response>;
 }
 
 /** Context of range request and response. */