diff --git a/types/index.esm.d.ts b/types/index.esm.d.ts
index 3066472c0b8..34c49810b0e 100644
--- a/types/index.esm.d.ts
+++ b/types/index.esm.d.ts
@@ -1953,7 +1953,7 @@ export class BasePlatform {
 export class BasicPlatform extends BasePlatform {}
 export class DomPlatform extends BasePlatform {}
 
-export declare enum DecimationAlgorithm {
+export const enum DecimationAlgorithm {
   lttb = 'lttb',
   minmax = 'min-max',
 }