diff --git a/readthedocs/proxito/views/hosting.py b/readthedocs/proxito/views/hosting.py
index f0354487530..215f92c91b8 100644
--- a/readthedocs/proxito/views/hosting.py
+++ b/readthedocs/proxito/views/hosting.py
@@ -540,7 +540,7 @@ def _v1(self, project, version, build, filename, url, request):
                     },
                 },
                 "filetreediff": {
-                    "enabled": False,
+                    "enabled": project.addons.filetreediff_enabled,
                 },
             },
         }