diff --git a/src/pocketmine/block/Fire.php b/src/pocketmine/block/Fire.php
index e7937c509f..63950d33a1 100644
--- a/src/pocketmine/block/Fire.php
+++ b/src/pocketmine/block/Fire.php
@@ -94,7 +94,7 @@ class Fire extends Flowable{
 		$down = $this->getSide(Vector3::SIDE_DOWN);
 
 		$result = null;
-		if($this->meta < 15){
+		if($this->meta < 15 and mt_rand(0, 2) === 0){
 			$this->meta++;
 			$result = $this;
 		}