diff --git a/tools/bundler/index.js b/tools/bundler/index.js
index b9b9d9e0..3596c8b3 100644
--- a/tools/bundler/index.js
+++ b/tools/bundler/index.js
@@ -166,6 +166,16 @@ function getDefinitionName(def) {
   if (def.startsWith('http://asyncapi.com/bindings')) {
     const result = bindingsRegex.exec(def);
     if (result) {
+      /*
+        4th element is for internal definitions like http://asyncapi.com/bindings/jms/0.0.1/server.json#/definitions/property
+
+        When is empty, we can ignore it:
+            convert this: http://asyncapi.com/bindings/jms/0.0.1/server.json
+            to this: bindings-jms-0.0.1-server
+        Otherwise we MUST add it to not broke Json Schema validation:
+            convert this: http://asyncapi.com/bindings/jms/0.0.1/server.json#/definitions/property
+            to this: bindings-jms-0.0.1-server/definitions/property
+      */
       if (result[4] === '') {
         return `${result[1].replace('/', '-')}-${result[2]}-${result[3]}`;
       }