diff --git a/src/sba.cpp b/src/sba.cpp
index 7396811..d87a9a3 100644
--- a/src/sba.cpp
+++ b/src/sba.cpp
@@ -98,6 +98,11 @@
 	return NULL;
 }
 
+gprs_rlcmac_sba *SBAController::find(const gprs_rlcmac_pdch *pdch, uint32_t fn)
+{
+	return find(pdch->trx_no(), pdch->ts_no, fn);
+}
+
 uint32_t SBAController::sched(uint8_t trx, uint8_t ts, uint32_t fn, uint8_t block_nr)
 {
 	uint32_t sba_fn;