diff --git a/Joining Queries/mapping-document-relationships.md b/Joining Queries/mapping-document-relationships.md
index 4a34382..e6b8176 100644
--- a/Joining Queries/mapping-document-relationships.md	
+++ b/Joining Queries/mapping-document-relationships.md	
@@ -1,17 +1,15 @@
 # Mapping document relationships
 
 ```
-PUT /department
+PUT /department/_mapping
 {
-  "mappings": {
-    "properties": {
-      "join_field": { 
-        "type": "join",
-        "relations": {
-          "department": "employee"
-        }
+  "properties": {
+    "join_field": { 
+      "type": "join",
+      "relations": {
+        "department": "employee"
       }
     }
   }
 }
-```
\ No newline at end of file
+```