1 files changed, 1 insertions, 1 deletions
diff --git a/modules-available/rebootcontrol/hooks/client-update.inc.php b/modules-available/rebootcontrol/hooks/client-update.inc.php
index 006a5e11..e934988d 100644
--- a/modules-available/rebootcontrol/hooks/client-update.inc.php
+++ b/modules-available/rebootcontrol/hooks/client-update.inc.php
@@ -7,7 +7,7 @@ if ($type === '~poweron') {
 		&& $subnet[0] === $ip && $subnet[1] >= 8 && $subnet[1] < 32) {
 		$start = ip2long($ip);
 		if ($start !== false) {
-			$maskHost = (int)(pow(2, 32 - $subnet[1]) - 1);
+			$maskHost = (int)(2 ** (32 - $subnet[1]) - 1);
 			$maskNet = ~$maskHost & 0xffffffff;
 			$end = $start | $maskHost;
 			$start &= $maskNet;