diff --git a/subsys/bluetooth/controller/ll_sw/ull_filter.c b/subsys/bluetooth/controller/ll_sw/ull_filter.c
index 4a05e6e19c1..41e6b84ae76 100644
--- a/subsys/bluetooth/controller/ll_sw/ull_filter.c
+++ b/subsys/bluetooth/controller/ll_sw/ull_filter.c
@@ -785,7 +785,7 @@ static u32_t wl_add(bt_addr_le_t *id_addr)
 
 	/* Duplicate  check */
 	if (i < ARRAY_SIZE(wl)) {
-		return BT_HCI_ERR_INVALID_PARAM;
+		return 0;
 	} else if (j >= ARRAY_SIZE(wl)) {
 		return BT_HCI_ERR_MEM_CAPACITY_EXCEEDED;
 	}