diff --git a/src/configuration.ts b/src/configuration.ts
index e85c933a23f..e2b49d75efa 100644
--- a/src/configuration.ts
+++ b/src/configuration.ts
@@ -68,6 +68,8 @@ export interface IConfigurationLoadResult {
 // Note: eslint prefers yaml over json, while tslint prefers json over yaml
 // for backward-compatibility.
 export const JSON_CONFIG_FILENAME = "tslint.json";
+/** @deprecated use `JSON_CONFIG_FILENAME` or `CONFIG_FILENAMES` instead. */
+export const CONFIG_FILENAME = JSON_CONFIG_FILENAME;
 export const CONFIG_FILENAMES = [JSON_CONFIG_FILENAME, "tslint.yaml", "tslint.yml"];
 
 export const DEFAULT_CONFIG: IConfigurationFile = {