diff --git a/src/world/generator/noise/NoiseGeneratorSimplex.php b/src/world/generator/noise/NoiseGeneratorSimplex.php
index f01f108b4..2989ba718 100644
--- a/src/world/generator/noise/NoiseGeneratorSimplex.php
+++ b/src/world/generator/noise/NoiseGeneratorSimplex.php
@@ -2,6 +2,7 @@
 
 /***REM_START***/
 require_once("NoiseGenerator.php");
+require_once("NoiseGeneratorPerlin.php");
 /***REM_END***/
 
 /**