diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 7bc9580c33..64fda22ac8 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -139,7 +139,7 @@ function gen_rand_string($num_chars)
 */
 function unique_id($extra = 0)
 {
-	list($sec, $usec) = explode(' ', microtime());
+	list($usec, $sec) = explode(' ', microtime());
 	mt_srand((float) $extra + (float) $sec + ((float) $usec * 100000));
 	return uniqid(mt_rand(), true);
 }
diff --git a/phpBB/includes/functions_messenger.php b/phpBB/includes/functions_messenger.php
index f9ce062d0b..895c6c078b 100644
--- a/phpBB/includes/functions_messenger.php
+++ b/phpBB/includes/functions_messenger.php
@@ -1162,7 +1162,6 @@ class smtp_class
 		if (!empty($md5_challenge))
 		{
 			$str = '';
-			mt_srand( (double) microtime() * 10000000);
 			for ($i = 0; $i < 32; $i++)
 			{
 				$str .= chr(mt_rand(0, 255));