diff --git a/index.html b/index.html
index e16d5128..6b699f51 100644
--- a/index.html
+++ b/index.html
@@ -7810,7 +7810,7 @@
     <script src="modules/routes-generator.js"></script>
     <script src="modules/religions-generator.js"></script>
     <script src="modules/military-generator.js"></script>
-    <script src="modules/markers-generator.js?v=1.87.12"></script>
+    <script src="modules/markers-generator.js?v=1.87.13"></script>
     <script src="modules/coa-generator.js"></script>
     <script src="modules/submap.js"></script>
     <script src="libs/polylabel.min.js"></script>
diff --git a/modules/markers-generator.js b/modules/markers-generator.js
index 2c3d7f5d..ac66cc63 100644
--- a/modules/markers-generator.js
+++ b/modules/markers-generator.js
@@ -710,7 +710,7 @@ window.Markers = (function () {
   }
 
   function addSacredMountain(id, cell) {
-    const {cells, cultures} = pack;
+    const {cells, religions} = pack;
 
     const culture = cells.c[cell].map(c => cells.culture[c]).find(c => c);
     const religion = cells.religion[cell];
diff --git a/versioning.js b/versioning.js
index 87c99f82..e93bdcb9 100644
--- a/versioning.js
+++ b/versioning.js
@@ -1,7 +1,7 @@
 "use strict";
 
 // version and caching control
-const version = "1.87.12"; // generator version, update each time
+const version = "1.87.13"; // generator version, update each time
 
 {
   document.title += " v" + version;