diff --git a/index.d.ts b/index.d.ts
index ec138d2264..7976adf740 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -83,7 +83,7 @@ export interface Connection extends mysql.Connection {
   sequenceId: number;
 }
 
-export interface PoolConnection extends mysql.PoolConnection, Connection {
+export interface PoolConnection extends mysql.PoolConnection {
   promise(promiseImpl?: PromiseConstructor): PromisePoolConnection;
 }