diff --git a/src/core/js/ext_jupyterdrag.js b/src/core/js/ext_jupyterdrag.js
index 87d2f3a964ced1411df66da04ff4ddd4d7db2f15..0d055170076e23dfecc3d282ffeee03886b1d15c 100644
--- a/src/core/js/ext_jupyterdrag.js
+++ b/src/core/js/ext_jupyterdrag.js
@@ -72,5 +72,7 @@ var ext_jupyterdrag = function($, logger, getEntityRole, getEntityID) {
 
 
 $(document).ready(function() {
-    caosdb_modules.register(ext_jupyterdrag);
+    if ("${BUILD_MODULE_EXT_JUPYTERDRAG}" == "ENABLED") {
+        caosdb_modules.register(ext_jupyterdrag);
+    }
 });