diff --git a/src/osmo-bts-litecell15/lc15_l1_if.c b/src/osmo-bts-litecell15/lc15_l1_if.c
index 0fcd7cf0..bf2ecec8 100644
--- a/src/osmo-bts-litecell15/lc15_l1_if.c
+++ b/src/osmo-bts-litecell15/lc15_l1_if.c
@@ -250,6 +250,7 @@ static int handle_ph_ra_ind(struct lc15l1_hdl *fl1h, GsmL1_PhRaInd_t *ra_ind)
 
 	switch (ra_ind->sapi) {
 	case GsmL1_Sapi_Pdtch:
+	case GsmL1_Sapi_Prach:
 		bts_update_tbf_ta("PH-RA", ra_ind->u32Fn, fl1h->trx_no, ra_ind->u8Tn,
 				  qta2ta(ra_ind->measParam.i16BurstTiming), true);
 		break;
diff --git a/src/osmo-bts-oc2g/oc2g_l1_if.c b/src/osmo-bts-oc2g/oc2g_l1_if.c
index 6c1e0f8c..0bfe0b93 100644
--- a/src/osmo-bts-oc2g/oc2g_l1_if.c
+++ b/src/osmo-bts-oc2g/oc2g_l1_if.c
@@ -249,6 +249,7 @@ static int handle_ph_ra_ind(struct oc2gl1_hdl *fl1h, GsmL1_PhRaInd_t *ra_ind)
 
 	switch (ra_ind->sapi) {
 	case GsmL1_Sapi_Pdtch:
+	case GsmL1_Sapi_Prach:
 		bts_update_tbf_ta("PH-RA", ra_ind->u32Fn, fl1h->trx_no, ra_ind->u8Tn,
 				  qta2ta(ra_ind->measParam.i16BurstTiming), true);
 		break;
diff --git a/src/osmo-bts-sysmo/sysmo_l1_if.c b/src/osmo-bts-sysmo/sysmo_l1_if.c
index 5e743db7..7406bbf3 100644
--- a/src/osmo-bts-sysmo/sysmo_l1_if.c
+++ b/src/osmo-bts-sysmo/sysmo_l1_if.c
@@ -239,6 +239,7 @@ static int handle_ph_ra_ind(struct femtol1_hdl *fl1h, GsmL1_PhRaInd_t *ra_ind)
 
 	switch (ra_ind->sapi) {
 	case GsmL1_Sapi_Pdtch:
+	case GsmL1_Sapi_Prach:
 		bts_update_tbf_ta("PH-RA", ra_ind->u32Fn, fl1h->trx_no, ra_ind->u8Tn,
 				  qta2ta(ra_ind->measParam.i16BurstTiming), true);
 		break;