diff --git a/game-sunlesssea/index.js b/game-sunlesssea/index.js
index fb0419f..0f2ab32 100644
--- a/game-sunlesssea/index.js
+++ b/game-sunlesssea/index.js
@@ -151,7 +151,7 @@ function installContent(files) {
 
 function checkJsonDirectoryStructure(files) {
     const baseFolders = ['addon', 'images'];
-    const subFolders = ['entities', 'encyclopaedia', 'geography']
+    const subFolders = ['constants', 'entities', 'encyclopaedia', 'geography']
 
     prepath = ""
     let pathto = ""