diff --git a/bin/letsencrypt-add.sh b/bin/letsencrypt-add.sh
index 85056da..a3e9563 100755
--- a/bin/letsencrypt-add.sh
+++ b/bin/letsencrypt-add.sh
@@ -33,7 +33,7 @@ while getopts "hd:" opt; do
       domain=${OPTARG,,}
       # basic but good enough domain name regex validation
       if [[ ! $domain =~ ^(([a-zA-Z0-9](-?[a-zA-Z0-9])*)\.)+[a-zA-Z]{2,}$ ]] ; then
-        echo "ERROR: Invalid domain name: $1"
+        echo "ERROR: Invalid domain name: $domain"
         exit 1
       fi
       ;;
diff --git a/bin/letsencrypt-certonly.sh b/bin/letsencrypt-certonly.sh
index 168cae6..10d3e96 100755
--- a/bin/letsencrypt-certonly.sh
+++ b/bin/letsencrypt-certonly.sh
@@ -35,7 +35,7 @@ while getopts "hd:tn" opt; do
       domain=${OPTARG,,}
       # basic but good enough domain name regex validation
       if [[ ! $domain =~ ^(([a-zA-Z0-9](-?[a-zA-Z0-9])*)\.)+[a-zA-Z]{2,}$ ]] ; then
-        echo "ERROR: Invalid domain name: $1"
+        echo "ERROR: Invalid domain name: $domain"
         exit 1
       fi
       ;;