diff --git a/lib/gds_api/json_client.rb b/lib/gds_api/json_client.rb
index <HASH>..<HASH> 100644
--- a/lib/gds_api/json_client.rb
+++ b/lib/gds_api/json_client.rb
@@ -88,7 +88,7 @@ module GdsApi
     end
 
     def delete_json!(url, params = nil, additional_headers = {})
-      do_request(:delete, url, params, additional_headers)
+      do_json_request(:delete, url, params, additional_headers)
     end
 
     def post_multipart(url, params)
Fix delete_json to actually call do_json_request.

This makes it consistent with put_json, post_json, and is the expected
behaviour given the method name.