diff --git a/src/pocketmine/Server.php b/src/pocketmine/Server.php
index a67f7c97b..2c1f1cdbd 100644
--- a/src/pocketmine/Server.php
+++ b/src/pocketmine/Server.php
@@ -2073,7 +2073,7 @@ class Server{
 
 			$now = microtime(true);
 			array_shift($this->tickAverage);
-			$this->tickAverage[] = min(20, 1 / ($now - $tickTime));
+			$this->tickAverage[] = min(20, 1 / max(0.001, $now - $tickTime));
 			array_shift($this->useAverage);
 			$this->useAverage[] = min(1, ($now - $tickTime) / 0.05);