diff --git a/src/types/miles.constants.ts b/src/types/miles.constants.ts
index 4d73cdc3..3bfba6c5 100644
--- a/src/types/miles.constants.ts
+++ b/src/types/miles.constants.ts
@@ -1,4 +1,5 @@
 export const MilesConstants = {
   MILES_EXTRA_DESCRIPTION_PROPERTY_NAME: 'x-miles-extra-description',
+  MILES_VALIDATION_MODEL_PROPERTY_NAME: 'x-miles-validation-model',
   HIDE_LOGO_QUERY_PARAM: 'hideLogo',
 };