diff --git a/system/database/DB_driver.php b/system/database/DB_driver.php
index 0f3a1ea..5a55002 100644
--- a/system/database/DB_driver.php
+++ b/system/database/DB_driver.php
@@ -98,7 +98,7 @@
 	{
 		// If an existing DB connection resource is supplied
 		// there is no need to connect and select the database
-		if (is_resource($this->conn_id))
+		if (is_resource($this->conn_id) OR is_object($this->conn_id))
 		{
 			return TRUE;
 		}
@@ -1097,7 +1097,7 @@
 	 */	
 	function close()
 	{
-		if (is_resource($this->conn_id))
+		if (is_resource($this->conn_id) OR is_object($this->conn_id))
 		{
 			$this->_close($this->conn_id);
 		}
diff --git a/system/database/drivers/mysqli/mysqli_result.php b/system/database/drivers/mysqli/mysqli_result.php
index 586c292..692d4f7 100644
--- a/system/database/drivers/mysqli/mysqli_result.php
+++ b/system/database/drivers/mysqli/mysqli_result.php
@@ -114,7 +114,7 @@
 	 */		
 	function free_result()
 	{
-		if (is_resource($this->result_id))
+		if (is_object($this->result_id))
 		{
 			mysqli_free_result($this->result_id);
 			$this->result_id = FALSE;
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index 9563556..851ec7a 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -111,6 +111,7 @@
 <ul>
 	<li>Fixed a bug (#3191) with ORIG_PATH_INFO URI parsing.</li>
     <li>Fixed assorted user guide typos (#3453, #4364, #4379, #4399, #4408, #4412, #4448, #4488).</li>
+	<li>Fixed DB Driver and MySQLi result driver checking for resources instead of objects (#3461).</li>
 	<li>Fixed an incorrect documentation of $this-&gt;load-&gt;language (#3520).</li>
 	<li>Fixed an AR_caching error where it wasn't tracking table aliases (#3463).</li>
 	<li>Fixed an AR bug when joining with a table alias and table prefix (#4400).</li>