diff --git a/src/Connection.php b/src/Connection.php
index 590f29d82..e13671afb 100644
--- a/src/Connection.php
+++ b/src/Connection.php
@@ -200,8 +200,8 @@ public function setDefaultDatabaseName($name)
     public function getDefaultDatabaseName()
     {
         if ($this->_defaultDatabaseName === null) {
-            if (preg_match('/^mongodb:\\/\\/.+\\/([^?&]+)/s', $this->dsn, $matches)) {
-                $this->_defaultDatabaseName = $matches[1];
+            if (preg_match('/^mongodb(:|\+srv:)\\/\\/.+\\/([^?&]+)/s', $this->dsn, $matches)) {
+                $this->_defaultDatabaseName = $matches[2];
             } else {
                 throw new InvalidConfigException("Unable to determine default database name from dsn.");
             }