diff --git a/system/database/DB_driver.php b/system/database/DB_driver.php
index 5a55002..a5ca75d 100644
--- a/system/database/DB_driver.php
+++ b/system/database/DB_driver.php
@@ -576,7 +576,7 @@
 	 */	
 	function is_write_type($sql)
 	{
-		if (! preg_match('/^\s*"?(INSERT|UPDATE|DELETE|REPLACE|CREATE|DROP|LOAD DATA|COPY|ALTER|GRANT|REVOKE|LOCK|UNLOCK)\s+/i', $sql))
+		if (! preg_match('/^\s*"?(SET|INSERT|UPDATE|DELETE|REPLACE|CREATE|DROP|LOAD DATA|COPY|ALTER|GRANT|REVOKE|LOCK|UNLOCK)\s+/i', $sql))
 		{
 			return FALSE;
 		}
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index 7ce6727..eef799f 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -117,6 +117,7 @@
 
 <h3>Bugfixes for 1.6.2</h3>
 <ul>
+	<li>Fixed a bug where SET queries were not being handled as "write" queries.</li>
 	<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>