diff --git a/pool_handler.go b/pool_handler.go
index 062f215..8f23910 100644
--- a/pool_handler.go
+++ b/pool_handler.go
@@ -7,7 +7,7 @@ import (
 )
 
 type PoolHandler interface {
-	Dial() (*grpc.ClientConn, interface{}, error)
+	Dial() (conn *grpc.ClientConn, client interface{}, err error)
 
 	GetIdleTimeout() time.Duration
 	GetMaxIdle() int