diff --git a/src/world/World.php b/src/world/World.php
index 999ad614d..03a99cce7 100644
--- a/src/world/World.php
+++ b/src/world/World.php
@@ -1295,7 +1295,10 @@ class World implements ChunkManager{
 	 * @return int bitmap, (id << 4) | data
 	 */
 	public function getFullBlock(int $x, int $y, int $z) : int{
-		return $this->getOrLoadChunk($x >> 4, $z >> 4, false)->getFullBlock($x & 0x0f, $y, $z & 0x0f);
+		if(($chunk = $this->getOrLoadChunk($x >> 4, $z >> 4, false)) !== null){
+			return $chunk->getFullBlock($x & 0x0f, $y, $z & 0x0f);
+		}
+		return BlockLegacyIds::AIR << 4; //TODO: this should throw (ungenerated chunk)
 	}
 
 	public function isInWorld(int $x, int $y, int $z) : bool{