diff --git a/src/constants.d.ts b/src/constants.d.ts
index fe5f5a623fb15bc73a65503d0b8e15084fa47d58..266553db0a0de40528cbe3fbb29ad41a624a5886 100644
--- a/src/constants.d.ts
+++ b/src/constants.d.ts
@@ -115,6 +115,7 @@ export const LinearToneMapping: ToneMapping;
 export const ReinhardToneMapping: ToneMapping;
 export const Uncharted2ToneMapping: ToneMapping;
 export const CineonToneMapping: ToneMapping;
+export const ACESFilmicToneMapping: ToneMapping;
 
 // Mapping modes
 export enum Mapping {}