diff --git a/packages/s2-core/src/common/interface/condition.ts b/packages/s2-core/src/common/interface/condition.ts
index f215d0bea4..d792b3433c 100644
--- a/packages/s2-core/src/common/interface/condition.ts
+++ b/packages/s2-core/src/common/interface/condition.ts
@@ -29,7 +29,7 @@ export interface MappingResult extends ValueRange {
 export type MappingFunction = (
   fieldValue: number | string,
   data: Record<string, any>,
-) => MappingResult;
+) => MappingResult | null | undefined;
 
 /**
  * One field can hold a condition