diff --git a/applications/apertif/designs/apertif_unb1_correlator/tb/python/labtest_fn_bf_emu_xc_full.sh b/applications/apertif/designs/apertif_unb1_correlator/tb/python/labtest_fn_bf_emu_xc_full.sh
index aa034d30b661c32a608fdac2ea39c41cf1ed6a86..603cbcd3c3cac1fae01163040d908e6436ceba32 100755
--- a/applications/apertif/designs/apertif_unb1_correlator/tb/python/labtest_fn_bf_emu_xc_full.sh
+++ b/applications/apertif/designs/apertif_unb1_correlator/tb/python/labtest_fn_bf_emu_xc_full.sh
@@ -50,7 +50,7 @@ python $UPE/peripherals/util_dp_bsn_aligner.py --unb 8 --bn 0 -r 2 -n 1 -s INPUT
 
 # . Mesh transceiver inputs
 python $UPE/peripherals/util_dp_bsn_aligner.py --unb 8 --fn 0:3 --bn 0:3 -r 0 -n 1 -s MESH # Input 0 carries RT2,3,4 X.
-python $UPE/peripherals/util_dp_bsn_aligner.py --unb 8 --fn 0:3 --bn 0:3 -r 4 -n 1 -s MESH # Input 0 carries RT2,3,4 Y.
+python $UPE/peripherals/util_dp_bsn_aligner.py --unb 8 --fn 0:3 --bn 0:3 -r 4 -n 1 -s MESH # Input 4 carries RT2,3,4 Y.
 
 ###############################################################################
 # BF+XC: Reset the XAUI cores to establish optical link alignment