diff --git a/nodemgmt-scripts.sh b/nodemgmt-scripts.sh
index e624f8bb..cf7fcc9c 100755
--- a/nodemgmt-scripts.sh
+++ b/nodemgmt-scripts.sh
@@ -147,7 +147,7 @@ LISTCERTS(){
 		spc1=${cw}-${#SUBJECT}
 		spc=''
 		for run in {1..${scp1}}; do
-			spc+=' '
+			spc="${spc} "
 		done
 		echo -e "${SUBJECT}${spc}$(date -d @${CERTEXPIRE} '+%m-%d-%Y')   ${SUBJECTNAMES}"