diff --git a/src/types/reducers.d.ts b/src/types/reducers.d.ts
index e8ec96e397..0f4a7ec52a 100644
--- a/src/types/reducers.d.ts
+++ b/src/types/reducers.d.ts
@@ -195,6 +195,7 @@ export type Editor = {
 
 export type SplitMapLayers = {[key: string]: boolean};
 export type SplitMap = {
+  id?: string;
   layers: SplitMapLayers;
 };