diff --git a/samples/bluetooth/iso_time_sync/prj.conf b/samples/bluetooth/iso_time_sync/prj.conf
index a301daaf51d4..f29213d091d1 100644
--- a/samples/bluetooth/iso_time_sync/prj.conf
+++ b/samples/bluetooth/iso_time_sync/prj.conf
@@ -4,6 +4,8 @@ CONFIG_BT_ISO_SYNC_RECEIVER=y
 CONFIG_BT_ISO_CENTRAL=y
 CONFIG_BT_ISO_PERIPHERAL=y
 CONFIG_BT_OBSERVER=y
+CONFIG_BT_CENTRAL=y
+CONFIG_BT_PERIPHERAL=y
 CONFIG_BT_DEVICE_NAME="Nordic_ISO"
 
 CONFIG_BT_MAX_CONN=5
@@ -18,6 +20,8 @@ CONFIG_BT_CTLR_CONN_ISO_STREAMS=4
 CONFIG_BT_ISO_TX_MTU=6
 CONFIG_BT_ISO_RX_MTU=23
 
+CONFIG_NRFX_GPPI=y
+
 CONFIG_CONSOLE=y
 CONFIG_CONSOLE_SUBSYS=y
 CONFIG_CONSOLE_HANDLER=y