diff --git a/inc/certs.inc b/inc/certs.inc
index 1230b4f0..5d9f4efb 100755
--- a/inc/certs.inc
+++ b/inc/certs.inc
@@ -205,7 +205,7 @@ LISTCERTS(){
 	declare -A oldCHECKCERT_DOMAINS
 	IFS=$'\n'
 	for LINE in `egrep -v '(^#|^$)' ${NM_FOLDER}/conf/ssl-domain-checks.conf`; do
-		oldCHECKCERT_DOMAINS+=${LINE}
+		oldCHECKCERT_DOMAINS+="${LINE}"
 	done
 	unset IFS									
 	IFS=$'\n' CHECKCERT_DOMAINSnew=($(sort <<<"${oldCHECKCERT_DOMAINS[*]}"))