diff --git a/src/pmf/Level.php b/src/pmf/Level.php
index b389c9a83..2c0c6d927 100644
--- a/src/pmf/Level.php
+++ b/src/pmf/Level.php
@@ -338,17 +338,17 @@ class PMFLevel extends PMF{
 		$aY = $y - ($Y << 4);
 		$bindex = $aY + ($aX << 5) + ($aZ << 9);
 		$mindex = ($aY >> 1) + 16 + ($aX << 5) + ($aZ << 9);
-		$old_b = $this->chunks[$index][$Y]{$bindex};
-		$old_m =  $this->chunks[$index][$Y]{$mindex};
+		$old_b = ord($this->chunks[$index][$Y]{$bindex});
+		$old_m = ord($this->chunks[$index][$Y]{$mindex});
 		if(($y & 1) === 0){
-			$old_m = $old_m & 0x0F;
-			$m = ($old_m << 4) | ($meta & 0x0F);
+			$o_m = $old_m & 0x0F;
+			$m = ($o_m << 4) | $meta;
 		}else{
-			$old_m = $old_m >> 4;
-			$m = (($meta << 4) & 0xF0) | $old_m;
+			$o_m = $old_m >> 4;
+			$m = ($meta << 4) | $o_m;
 		}
-		if($old_b !== $block or $old_m !== $meta){
-			$this->chunks[$index][$Y]{$bindex} = chr($block & 0xFF);
+		if($old_b !== $block or $old_m !== $m){
+			$this->chunks[$index][$Y]{$bindex} = chr($block);
 			$this->chunks[$index][$Y]{$mindex} = chr($m);		
 			if(!isset($this->chunkChange[$index][$Y])){
 				$this->chunkChange[$index][$Y] = 1;