diff --git a/dnsapi/dns_lexicon.sh b/dnsapi/dns_lexicon.sh
index 5e78a2d9..8ff8ffb1 100755
--- a/dnsapi/dns_lexicon.sh
+++ b/dnsapi/dns_lexicon.sh
@@ -32,7 +32,7 @@ dns_lexicon_add() {
   Lx_name=$(echo LEXICON_${PROVIDER}_USERNAME |  tr [a-z] [A-Z])
   eval Lx_name_v="\$$Lx_name"
   _debug "$Lx_name" "$Lx_name_v"
-  if [ "$Lx_name_v" ] ; then
+  if [ -n "$Lx_name_v" ] ; then
     _saveaccountconf $Lx_name "$Lx_name_v"
     export "$Lx_name"
   fi
@@ -40,7 +40,7 @@ dns_lexicon_add() {
   Lx_token=$(echo LEXICON_${PROVIDER}_TOKEN |  tr [a-z] [A-Z])
   eval Lx_token_v="\$$Lx_token"
   _debug "$Lx_token" "$Lx_token_v"
-  if [ "$Lx_token_v" ] ; then
+  if [ -n "$Lx_token_v" ] ; then
     _saveaccountconf $Lx_token "$Lx_token_v"
     export "$Lx_token"
   fi
@@ -48,7 +48,7 @@ dns_lexicon_add() {
   Lx_password=$(echo LEXICON_${PROVIDER}_PASSWORD |  tr [a-z] [A-Z])
   eval Lx_password_v="\$$Lx_password"
   _debug "$Lx_password" "$Lx_password_v"
-  if [ "$Lx_password_v" ] ; then
+  if [ -n "$Lx_password_v" ] ; then
     _saveaccountconf $Lx_password "$Lx_password_v"
     export "$Lx_password"
   fi
@@ -56,7 +56,7 @@ dns_lexicon_add() {
   Lx_domaintoken=$(echo LEXICON_${PROVIDER}_DOMAINTOKEN |  tr [a-z] [A-Z])
   eval Lx_domaintoken_v="\$$Lx_domaintoken"
   _debug "$Lx_domaintoken" "$Lx_domaintoken_v"
-  if [ "$Lx_domaintoken_v" ] ; then
+  if [ -n "$Lx_domaintoken_v" ] ; then
     export "$Lx_domaintoken"
     _saveaccountconf $Lx_domaintoken "$Lx_domaintoken_v"
   fi