diff --git a/daemon/container_operations.go b/daemon/container_operations.go
index 7a1b5c4005..ccdbb384ad 100644
--- a/daemon/container_operations.go
+++ b/daemon/container_operations.go
@@ -992,8 +992,7 @@ func (daemon *Daemon) getNetworkedContainer(containerID, connectedContainerID st
 		return nil, fmt.Errorf("cannot join own network")
 	}
 	if !nc.IsRunning() {
-		err := fmt.Errorf("cannot join network of a non running container: %s", connectedContainerID)
-		return nil, errdefs.Conflict(err)
+		return nil, errdefs.Conflict(fmt.Errorf("cannot join network of a non running container: %s", connectedContainerID))
 	}
 	if nc.IsRestarting() {
 		return nil, errContainerIsRestarting(connectedContainerID)