diff --git a/pcu/GPRS_Components.ttcn b/pcu/GPRS_Components.ttcn
index 2686ba3..51c5a8d 100644
--- a/pcu/GPRS_Components.ttcn
+++ b/pcu/GPRS_Components.ttcn
@@ -910,6 +910,7 @@
 	if (not match(data_block.mac_hdr.hdr_ext.bsn, exp_bsn)) {
 		setverdict(fail, "DL block BSN doesn't match: ",
 			   data_block.mac_hdr.hdr_ext.bsn, " vs exp ", exp_bsn);
+		f_shutdown(__BFILE__, __LINE__);
 	}
 
 	if (lengthof(data_block.blocks) < 1) {