diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c
index 841d8900504d224fa679358bc40fd0698e23ca51..a23a37a4d5dc345f28691cf470bdcadb8e3487ba 100644
--- a/drivers/ptp/ptp_clock.c
+++ b/drivers/ptp/ptp_clock.c
@@ -218,6 +218,7 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info,
 			pr_err("failed to create ptp aux_worker %d\n", err);
 			goto kworker_err;
 		}
+		ptp->pps_source->lookup_cookie = ptp;
 	}
 
 	err = ptp_populate_pin_groups(ptp);