diff --git a/ui/src/assets/schema/provider/filebacked-http-filters.schema.json b/ui/src/assets/schema/provider/filebacked-http-filters.schema.json
index eb65584ac..ee7b8208d 100644
--- a/ui/src/assets/schema/provider/filebacked-http-filters.schema.json
+++ b/ui/src/assets/schema/provider/filebacked-http-filters.schema.json
@@ -25,7 +25,7 @@
                                     "P14D",
                                     "P7D",
                                     "P1D",
-                                    "P12H"
+                                    "PT12H"
                                 ]
                             },
                             "default": null,