diff --git a/src/tbf_fsm.h b/src/tbf_fsm.h
index 903bcd7..0acd4e5 100644
--- a/src/tbf_fsm.h
+++ b/src/tbf_fsm.h
@@ -29,6 +29,7 @@
 	TBF_EV_ASSIGN_READY_CCCH, /* TBF Start Time timer triggered */
 	TBF_EV_ASSIGN_PCUIF_CNF, /* Transmission of IMM.ASS for DL TBF to the MS confirmed by BTS over PCUIF */
 	TBF_EV_FIRST_UL_DATA_RECVD, /* UL TBF: Received first UL data from MS. Equals to Contention Resolution completed on the network side */
+	TBF_EV_CONTENTION_RESOLUTION_MS_SUCCESS, /* UL TBF: Contention resolution success at the mobile station side (first UL_ACK_NACK confirming TLLI is received at the MS) */
 	TBF_EV_DL_ACKNACK_MISS, /* DL TBF: We polled for DL ACK/NACK but we received none (POLL timeout) */
 	TBF_EV_LAST_DL_DATA_SENT, /* DL TBF sends RLCMAC block containing last DL avilable data buffered */
 	TBF_EV_LAST_UL_DATA_RECVD, /* UL TBF sends RLCMAC block containing last UL data (cv=0) */