diff --git a/tests/ulc/PdchUlcTest.cpp b/tests/ulc/PdchUlcTest.cpp
index 2501f60..a199311 100644
--- a/tests/ulc/PdchUlcTest.cpp
+++ b/tests/ulc/PdchUlcTest.cpp
@@ -169,6 +169,7 @@
 			   bool single, int8_t use_tbf)
 {
 	tbf->trx = &bts->trx[0];
+	ms_set_first_common_ts(tbf_ms(tbf), &tbf->trx->pdch[0]);
 	return 0;
 }