diff --git a/src/osmo-bsc/lchan_fsm.c b/src/osmo-bsc/lchan_fsm.c
index 9ca73df..f55fbf9 100644
--- a/src/osmo-bsc/lchan_fsm.c
+++ b/src/osmo-bsc/lchan_fsm.c
@@ -210,7 +210,7 @@
 
 struct osmo_tdef_state_timeout lchan_fsm_timeouts[32] = {
 	[LCHAN_ST_WAIT_TS_READY]	= { .T=23001 },
-	[LCHAN_ST_WAIT_ACTIV_ACK]	= { .T=23002 },
+	[LCHAN_ST_WAIT_ACTIV_ACK]	= { .T=-23002 },
 	[LCHAN_ST_WAIT_RLL_RTP_ESTABLISH]	= { .T=3101 },
 	[LCHAN_ST_WAIT_RLL_RTP_RELEASED]	= { .T=3109 },
 	[LCHAN_ST_WAIT_BEFORE_RF_RELEASE]	= { .T=3111 },
diff --git a/src/osmo-bsc/lchan_rtp_fsm.c b/src/osmo-bsc/lchan_rtp_fsm.c
index da09aec..25aca14 100644
--- a/src/osmo-bsc/lchan_rtp_fsm.c
+++ b/src/osmo-bsc/lchan_rtp_fsm.c
@@ -42,10 +42,10 @@
 }
 
 struct osmo_tdef_state_timeout lchan_rtp_fsm_timeouts[32] = {
-	[LCHAN_RTP_ST_WAIT_MGW_ENDPOINT_AVAILABLE] = { .T=23004 },
-	[LCHAN_RTP_ST_WAIT_IPACC_CRCX_ACK]	= { .T=23005 },
-	[LCHAN_RTP_ST_WAIT_IPACC_MDCX_ACK]	= { .T=23006 },
-	[LCHAN_RTP_ST_WAIT_MGW_ENDPOINT_CONFIGURED] = { .T=23004 },
+	[LCHAN_RTP_ST_WAIT_MGW_ENDPOINT_AVAILABLE] = { .T=-23004 },
+	[LCHAN_RTP_ST_WAIT_IPACC_CRCX_ACK]	= { .T=-23005 },
+	[LCHAN_RTP_ST_WAIT_IPACC_MDCX_ACK]	= { .T=-23006 },
+	[LCHAN_RTP_ST_WAIT_MGW_ENDPOINT_CONFIGURED] = { .T=-23004 },
 };
 
 /* Transition to a state, using the T timer defined in lchan_rtp_fsm_timeouts.