diff --git a/src/tbf_dl.cpp b/src/tbf_dl.cpp
index 33eb75b..84f6166 100644
--- a/src/tbf_dl.cpp
+++ b/src/tbf_dl.cpp
@@ -498,7 +498,7 @@
 			state_flags |= (1 << GPRS_RLCMAC_FLAG_PACCH);
 
 		/* start timer */
-		t_start(T0, T_ASS_PACCH_SEC, 0, "assignment (PACCH)", true);
+		T_START(this, T0, T_ASS_PACCH_SEC, 0, "assignment (PACCH)", true);
 	} else {
 		LOGPTBFDL(this, LOGL_DEBUG, "Send dowlink assignment on PCH, no TBF exist (IMSI=%s)\n",
 			  imsi());
@@ -854,7 +854,7 @@
 			m_tx_counter = 0;
 			/* start timer whenever we send the final block */
 			if (is_final)
-				t_start(T3191, bts_data()->t3191, 0, "final block (DL-TBF)", true);
+				T_START(this, T3191, bts_data()->t3191, 0, "final block (DL-TBF)", true);
 
 			clear_poll_timeout_flag();
 
@@ -1116,7 +1116,7 @@
 	set_state(GPRS_RLCMAC_WAIT_RELEASE);
 
 	/* start T3193 */
-	t_start(T3193, bts_data()->t3193_msec / 1000, (bts_data()->t3193_msec % 1000) * 1000,
+	T_START(this, T3193, bts_data()->t3193_msec / 1000, (bts_data()->t3193_msec % 1000) * 1000,
 		  "release (DL-TBF)", true);
 
 	/* reset rlc states */