diff --git a/lib/private/security/trusteddomainhelper.php b/lib/private/security/trusteddomainhelper.php
index 885ceee23c..409628677a 100644
--- a/lib/private/security/trusteddomainhelper.php
+++ b/lib/private/security/trusteddomainhelper.php
@@ -78,6 +78,12 @@ class TrustedDomainHelper {
 		if (preg_match(Request::REGEX_LOCALHOST, $domain) === 1) {
 			return true;
 		}
+
+		// Compare with port appended
+		if(in_array($domainWithPort, $trustedList, true)) {
+			return true;
+		}
+
 		return in_array($domain, $trustedList, true);
 	}
 
diff --git a/tests/lib/security/trusteddomainhelper.php b/tests/lib/security/trusteddomainhelper.php
index 52a8f1be63..3581211ce6 100644
--- a/tests/lib/security/trusteddomainhelper.php
+++ b/tests/lib/security/trusteddomainhelper.php
@@ -42,7 +42,12 @@ class TrustedDomainHelperTest extends \Test\TestCase {
 	 * @return array
 	 */
 	public function trustedDomainDataProvider() {
-		$trustedHostTestList = ['host.one.test', 'host.two.test', '[1fff:0:a88:85a3::ac1f]'];
+		$trustedHostTestList = [
+			'host.one.test',
+			'host.two.test',
+			'[1fff:0:a88:85a3::ac1f]',
+			'host.three.test:443',
+		];
 		return [
 			// empty defaults to false with 8.1
 			[null, 'host.one.test:8080', false],
@@ -56,6 +61,9 @@ class TrustedDomainHelperTest extends \Test\TestCase {
 			[$trustedHostTestList, '[1fff:0:a88:85a3::ac1f]', true],
 			[$trustedHostTestList, '[1fff:0:a88:85a3::ac1f]:801', true],
 			[$trustedHostTestList, '[1fff:0:a88:85a3::ac1f]:801:34', false],
+			[$trustedHostTestList, 'host.three.test:443', true],
+			[$trustedHostTestList, 'host.three.test:80', false],
+			[$trustedHostTestList, 'host.three.test', false],
 			// trust localhost regardless of trust list
 			[$trustedHostTestList, 'localhost', true],
 			[$trustedHostTestList, 'localhost:8080', true],