diff --git a/src/world/format/SubChunkInterface.php b/src/world/format/SubChunkInterface.php
index 8c0af1766..d2daa72fe 100644
--- a/src/world/format/SubChunkInterface.php
+++ b/src/world/format/SubChunkInterface.php
@@ -34,7 +34,7 @@ interface SubChunkInterface{
 
 	/**
 	 * Returns a non-authoritative bool to indicate whether the chunk contains any blocks.
-	 * This is a fast check, but may be inaccurate if the chunk has been modified and not garbage-collected.
+	 * This may report non-empty erroneously if the chunk has been modified and not garbage-collected.
 	 */
 	public function isEmptyFast() : bool;