diff --git a/src/pocketmine/PocketMine.php b/src/pocketmine/PocketMine.php
index 1ac03c500..485ba1ace 100644
--- a/src/pocketmine/PocketMine.php
+++ b/src/pocketmine/PocketMine.php
@@ -360,6 +360,7 @@ namespace pocketmine {
 	}
 
 	@define("ENDIANNESS", (pack("d", 1) === "\77\360\0\0\0\0\0\0" ? Binary::BIG_ENDIAN : Binary::LITTLE_ENDIAN));
+	@define("INT32_MASK", is_int(0xffffffff) ? 0xffffffff : -1);
 	@ini_set("opcache.mmap_base", bin2hex(Utils::getRandomBytes(8, false))); //Fix OPCache address errors
 
 	if(!file_exists(\pocketmine\DATA . "server.properties") and !isset($opts["no-wizard"])){
diff --git a/src/pocketmine/utils/Random.php b/src/pocketmine/utils/Random.php
index 8184cecb0..26cc4858d 100644
--- a/src/pocketmine/utils/Random.php
+++ b/src/pocketmine/utils/Random.php
@@ -48,9 +48,9 @@ class Random{
 	 */
 	public function setSeed($seed){
 		$seed = crc32($seed);
-		$this->x = ($seed ^ 9876543210) % 0x7fffffff;
-		$this->z = ($seed ^ -123456789) % 0x7fffffff;
-		$this->y = ($seed ^ 1122334455) % 0x7fffffff;
+		$this->x = ($seed ^ 1076543210) & INT32_MASK;
+		$this->z = ($seed ^ 0xdeadc0de) & INT32_MASK;
+		$this->y = ($seed ^ 1122334455) & INT32_MASK;
 	}
 
 	/**
@@ -68,9 +68,9 @@ class Random{
 	 * @return int
 	 */
 	public function nextSignedInt(){
-		$this->x ^= ($this->x << 16) & 0xffffffff;
-		$this->x ^= ($this->x >> 5) & 0xffffffff;
-		$this->x ^= ($this->x << 1) & 0xffffffff;
+		$this->x ^= ($this->x << 16) & INT32_MASK;
+		$this->x ^= ($this->x >> 5) & INT32_MASK;
+		$this->x ^= ($this->x << 1) & INT32_MASK;
 
 		$t = $this->x;
 		$this->x = $this->y;
@@ -82,7 +82,7 @@ class Random{
 		if($t > 2147483647){
 			$t -= 4294967296;
 		}
-		return (int) $t % 0x7fffffff;
+		return (int) $t;
 	}
 
 	/**