diff --git a/inc/certs.inc b/inc/certs.inc
index 1b0d7019..539e9e81 100755
--- a/inc/certs.inc
+++ b/inc/certs.inc
@@ -196,7 +196,7 @@ LISTCERTS(){
 		unset IFS
 	fi
 	
-	for c in ${!CHECKCERT_DOMAINS[@]}; do
+	for c in "${!CHECKCERT_DOMAINS[@]}"; do
 		echo "HERE1: ${c} = ${CHECKCERT_DOMAINS[${c}]}"
 	done
 		
@@ -212,7 +212,7 @@ LISTCERTS(){
 	unset IFS									
 	readarray -td '' CHECKCERT_DOMAINS < <(printf '%s\0' "${oldCHECKCERT_DOMAINS[@]}" | sort -z)
 	
-	for c in ${!CHECKCERT_DOMAINS[@]}; do
+	for c in "${!CHECKCERT_DOMAINS[@]}"; do
 		echo "HERE2: ${c} = ${CHECKCERT_DOMAINS[${c}]}"
 	done