diff --git a/plugins/node/opentelemetry-koa-instrumentation/src/types.ts b/plugins/node/opentelemetry-koa-instrumentation/src/types.ts
index 23f1264c37..9e9aaad17b 100644
--- a/plugins/node/opentelemetry-koa-instrumentation/src/types.ts
+++ b/plugins/node/opentelemetry-koa-instrumentation/src/types.ts
@@ -43,6 +43,9 @@ export enum KoaLayerType {
 
 export const KoaComponentName = 'koa';
 
+/**
+ * extends opentelemetry/api Span object to instrument the root span name of http plugin by getting parent span id
+ */
 export interface KoaPluginSpan extends Span {
   parentSpanId?: string;
 }