diff --git a/patch-control.sh b/patch-control.sh
index 703f327b89d818d8a7992a927711c57c53e453c1..4f83bc903568a5a6f005d908e015c5661135a8d5 100755
--- a/patch-control.sh
+++ b/patch-control.sh
@@ -204,7 +204,7 @@ ssh ${DAQ_USER}@${DAQ_SERVER} "[ -e ${ROOT_FILE} ]" && {
 
 let "run_duration_seconds = ${run_duration} * 60"
 
-daq_log_file=~/.km3_private/daq_${run_number}.log
+daq_log_file=~/.km3_private/daq_`printf "%08d" ${run_number}`.log
 JGetMessage -H ${DAQ_SERVER} -T MSG -d 3 >${daq_log_file} &
 PROCS=(${PROCS[*]} $!)