diff --git a/server_files/model.php b/server_files/model.php
index 8bc7789..f89fcf6 100644
--- a/server_files/model.php
+++ b/server_files/model.php
@@ -109,7 +109,7 @@ function canValidate(Team $team)
 	$can_validate &= $team->getParticipants()[2] != null;
 	$can_validate &= preg_match("#[1-4]#", $team->getProblem());
 
-	for ($i = 1; $i <= 5; ++$i) {
+	for ($i = 0; $i < 5; ++$i) {
 		if ($team->getParticipants()[$i] === NULL)
 			continue;