diff --git a/res/ari/ari_model_validators.c b/res/ari/ari_model_validators.c
index e3ca10a9a31e104bc406d997996dd04e3fe9e6a8..8910bbb94a713bff9a7d3fd89a15dc9d2906c16a 100644
--- a/res/ari/ari_model_validators.c
+++ b/res/ari/ari_model_validators.c
@@ -2455,6 +2455,7 @@ int ast_ari_validate_application_move_failed(struct ast_json *json)
 	struct ast_json_iter *iter;
 	int has_type = 0;
 	int has_application = 0;
+	int has_timestamp = 0;
 	int has_args = 0;
 	int has_channel = 0;
 	int has_destination = 0;
@@ -2491,6 +2492,7 @@ int ast_ari_validate_application_move_failed(struct ast_json *json)
 		} else
 		if (strcmp("timestamp", ast_json_object_iter_key(iter)) == 0) {
 			int prop_is_valid;
+			has_timestamp = 1;
 			prop_is_valid = ast_ari_validate_date(
 				ast_json_object_iter_value(iter));
 			if (!prop_is_valid) {
@@ -2547,6 +2549,11 @@ int ast_ari_validate_application_move_failed(struct ast_json *json)
 		res = 0;
 	}
 
+	if (!has_timestamp) {
+		ast_log(LOG_ERROR, "ARI ApplicationMoveFailed missing required field timestamp\n");
+		res = 0;
+	}
+
 	if (!has_args) {
 		ast_log(LOG_ERROR, "ARI ApplicationMoveFailed missing required field args\n");
 		res = 0;
diff --git a/res/ari/ari_model_validators.h b/res/ari/ari_model_validators.h
index adf3e1a070034bc6a12ad10387bacbf183f5714a..f9285b43ce40a07cce3792fee984a035375c8fec 100644
--- a/res/ari/ari_model_validators.h
+++ b/res/ari/ari_model_validators.h
@@ -1603,7 +1603,7 @@ ari_validator ast_ari_validate_application_fn(void);
  * - asterisk_id: string
  * - type: string (required)
  * - application: string (required)
- * - timestamp: Date
+ * - timestamp: Date (required)
  * - args: List[string] (required)
  * - channel: Channel (required)
  * - destination: string (required)