diff --git a/library/L1CTL_Types.ttcn b/library/L1CTL_Types.ttcn
index 2e1f34b..7571b4f 100644
--- a/library/L1CTL_Types.ttcn
+++ b/library/L1CTL_Types.ttcn
@@ -54,7 +54,8 @@
 		L1CTL_GPRS_UL_BLOCK_REQ,
 		L1CTL_GPRS_DL_BLOCK_IND,
 		L1CTL_EXT_RACH_REQ,
-		L1CTL_GPRS_RTS_IND
+		L1CTL_GPRS_RTS_IND,
+		L1CTL_GPRS_UL_BLOCK_CNF
 	} with { variant "FIELDLENGTH(8)" };
 
 	type enumerated L1ctlCcchMode {
@@ -342,6 +343,13 @@
 		octetstring		data
 	} with { variant (data) "BYTEORDER(first)" };
 
+	/* payload of L1CTL_GPRS_UL_BLOCK_CNF */
+	type record L1ctlGprsUlBlockCnf {
+		uint32_t		fn,
+		uint8_t			tn,
+		octetstring		data
+	} with { variant "" };
+
 	/* payload of L1CTL_GPRS_DL_BLOCK_IND */
 	type record L1ctlGprsDlBlockInd {
 		L1ctlGprsBlockHdr	hdr,
@@ -390,6 +398,7 @@
 		L1ctlGprsUlTbfCfgReq	ul_tbf_cfg_req,
 		L1ctlGprsDlTbfCfgReq	dl_tbf_cfg_req,
 		L1ctlGprsUlBlockReq	ul_block_req,
+		L1ctlGprsUlBlockCnf	ul_block_cnf,
 		L1ctlGprsDlBlockInd	dl_block_ind,
 		L1ctlExtRachReq		ext_rach_req,
 		L1ctlGprsRtsInd		rts_ind,
@@ -445,6 +454,7 @@
 					     ul_tbf_cfg_req, header.msg_type = L1CTL_GPRS_UL_TBF_CFG_REQ;
 					     dl_tbf_cfg_req, header.msg_type = L1CTL_GPRS_DL_TBF_CFG_REQ;
 					     ul_block_req, header.msg_type = L1CTL_GPRS_UL_BLOCK_REQ;
+					     ul_block_cnf, header.msg_type = L1CTL_GPRS_UL_BLOCK_CNF;
 					     dl_block_ind, header.msg_type = L1CTL_GPRS_DL_BLOCK_IND;
 					     ext_rach_req, header.msg_type = L1CTL_EXT_RACH_REQ;
 					     rts_ind, header.msg_type = L1CTL_GPRS_RTS_IND;