diff --git a/src/Illuminate/Database/Connectors/PostgresConnector.php b/src/Illuminate/Database/Connectors/PostgresConnector.php
index c54163f9b89f..2d68a205a87c 100755
--- a/src/Illuminate/Database/Connectors/PostgresConnector.php
+++ b/src/Illuminate/Database/Connectors/PostgresConnector.php
@@ -167,13 +167,14 @@ protected function getDsn(array $config)
         // name than the database used for "information_schema" queries. This is
         // typically the case if using "pgbouncer" type software when pooling.
         $database = $connect_via_database ?? $database;
+        $port = $connect_via_port ?? $port ?? null;
 
         $dsn = "pgsql:{$host}dbname='{$database}'";
 
         // If a port was specified, we will add it to this Postgres DSN connections
         // format. Once we have done that we are ready to return this connection
         // string back out for usage, as this has been fully constructed here.
-        if (isset($config['port'])) {
+        if ($port !== null) {
             $dsn .= ";port={$port}";
         }
 
diff --git a/tests/Database/DatabaseConnectorTest.php b/tests/Database/DatabaseConnectorTest.php
index 24f6bc326842..79ee6d0606c4 100755
--- a/tests/Database/DatabaseConnectorTest.php
+++ b/tests/Database/DatabaseConnectorTest.php
@@ -232,6 +232,22 @@ public function testPostgresApplicationUseAlternativeDatabaseName()
         $this->assertSame($result, $connection);
     }
 
+    public function testPostgresApplicationUseAlternativeDatabaseNameAndPort()
+    {
+        $dsn = 'pgsql:dbname=\'baz\';port=2345';
+        $config = ['database' => 'bar', 'connect_via_database' => 'baz', 'port' => 5432, 'connect_via_port' => 2345];
+        $connector = $this->getMockBuilder(PostgresConnector::class)->onlyMethods(['createConnection', 'getOptions'])->getMock();
+        $connection = m::mock(stdClass::class);
+        $connector->expects($this->once())->method('getOptions')->with($this->equalTo($config))->willReturn(['options']);
+        $connector->expects($this->once())->method('createConnection')->with($this->equalTo($dsn), $this->equalTo($config), $this->equalTo(['options']))->willReturn($connection);
+        $statement = m::mock(PDOStatement::class);
+        $connection->shouldReceive('prepare')->zeroOrMoreTimes()->andReturn($statement);
+        $statement->shouldReceive('execute')->zeroOrMoreTimes();
+        $result = $connector->connect($config);
+
+        $this->assertSame($result, $connection);
+    }
+
     public function testPostgresConnectorReadsIsolationLevelFromConfig()
     {
         $dsn = 'pgsql:host=foo;dbname=\'bar\';port=111';