diff --git a/lib/Froxlor/Api/Commands/Domains.php b/lib/Froxlor/Api/Commands/Domains.php
index 93d853f4c8..cbf85fef1c 100644
--- a/lib/Froxlor/Api/Commands/Domains.php
+++ b/lib/Froxlor/Api/Commands/Domains.php
@@ -1523,7 +1523,7 @@ public function update()
 
 			// validate dns if lets encrypt is enabled to check whether we can use it at all
 			if ($letsencrypt == '1' && Settings::Get('system.le_domain_dnscheck') == '1') {
-				$domain_ips = PhpHelper::gethostbynamel6($domain, true, Settings::Get('system.le_domain_dnscheck_resolver'));
+				$domain_ips = PhpHelper::gethostbynamel6($result['domain'], true, Settings::Get('system.le_domain_dnscheck_resolver'));
 				$selected_ips = $this->getIpsFromIdArray($ssl_ipandports);
 				if ($domain_ips == false || count(array_intersect($selected_ips, $domain_ips)) <= 0) {
 					Response::standardError('invaliddnsforletsencrypt', '', true);
diff --git a/lib/Froxlor/Api/Commands/SubDomains.php b/lib/Froxlor/Api/Commands/SubDomains.php
index 6389650d3e..98c05cb95f 100644
--- a/lib/Froxlor/Api/Commands/SubDomains.php
+++ b/lib/Froxlor/Api/Commands/SubDomains.php
@@ -262,7 +262,7 @@ public function add()
 			// validate dns if lets encrypt is enabled to check whether we can use it at all
 			if ($letsencrypt == '1' && Settings::Get('system.le_domain_dnscheck') == '1') {
 				$our_ips = Domain::getIpsOfDomain($domain_check['id']);
-				$domain_ips = PhpHelper::gethostbynamel6($domain, true, Settings::Get('system.le_domain_dnscheck_resolver'));
+				$domain_ips = PhpHelper::gethostbynamel6($completedomain, true, Settings::Get('system.le_domain_dnscheck_resolver'));
 				if ($domain_ips == false || count(array_intersect($our_ips, $domain_ips)) <= 0) {
 					Response::standardError('invaliddnsforletsencrypt', '', true);
 				}
@@ -738,7 +738,7 @@ public function update()
 		// validate dns if lets encrypt is enabled to check whether we can use it at all
 		if ($result['letsencrypt'] != $letsencrypt && $letsencrypt == '1' && Settings::Get('system.le_domain_dnscheck') == '1') {
 			$our_ips = Domain::getIpsOfDomain($result['parentdomainid']);
-			$domain_ips = PhpHelper::gethostbynamel6($domain, true, Settings::Get('system.le_domain_dnscheck_resolver'));
+			$domain_ips = PhpHelper::gethostbynamel6($result['domain'], true, Settings::Get('system.le_domain_dnscheck_resolver'));
 			if ($domain_ips == false || count(array_intersect($our_ips, $domain_ips)) <= 0) {
 				Response::standardError('invaliddnsforletsencrypt', '', true);
 			}