diff --git a/deno_dist/request.ts b/deno_dist/request.ts
index 4d353a00b..ea1825379 100644
--- a/deno_dist/request.ts
+++ b/deno_dist/request.ts
@@ -79,6 +79,7 @@ export class HonoRequest<P extends string = '/', I extends Input['out'] = {}> {
   param<P2 extends RemoveQuestion<ParamKeys<P>> = RemoveQuestion<ParamKeys<P>>>(
     key: P2
   ): string | undefined
+  param(key: string): string | undefined
   param<P2 extends string = P>(): UnionToIntersection<ParamKeyToRecord<ParamKeys<P2>>>
   param(key?: string): unknown {
     return key ? this.getDecodedParam(key) : this.getAllDecodedParams()
diff --git a/src/hono.test.ts b/src/hono.test.ts
index 02429274f..3a79dac82 100644
--- a/src/hono.test.ts
+++ b/src/hono.test.ts
@@ -856,8 +856,6 @@ describe('param and query', () => {
   describe('param with undefined', () => {
     const app = new Hono()
     app.get('/foo/:foo', (c) => {
-      // eslint-disable-next-line @typescript-eslint/ban-ts-comment
-      /* @ts-ignore */
       const bar = c.req.param('bar')
       return c.json({ foo: bar })
     })
diff --git a/src/request.ts b/src/request.ts
index fa748c5f1..b5fd8546e 100644
--- a/src/request.ts
+++ b/src/request.ts
@@ -79,6 +79,7 @@ export class HonoRequest<P extends string = '/', I extends Input['out'] = {}> {
   param<P2 extends RemoveQuestion<ParamKeys<P>> = RemoveQuestion<ParamKeys<P>>>(
     key: P2
   ): string | undefined
+  param(key: string): string | undefined
   param<P2 extends string = P>(): UnionToIntersection<ParamKeyToRecord<ParamKeys<P2>>>
   param(key?: string): unknown {
     return key ? this.getDecodedParam(key) : this.getAllDecodedParams()