diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_mapping.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_mapping.json
index b2b0741203be0..c95f5ea3b48f3 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_mapping.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_mapping.json
@@ -8,7 +8,7 @@
     "url":{
       "paths":[
         {
-          "path":"{index}/_mapping",
+          "path":"/{index}/_mapping",
           "methods":[
             "PUT",
             "POST"