diff --git a/reports/api-extractor.md b/reports/api-extractor.md
index 72b5244be0e..efddc0e93be 100644
--- a/reports/api-extractor.md
+++ b/reports/api-extractor.md
@@ -743,7 +743,7 @@ export type UseWatchProps<TFieldValues extends FieldValues = FieldValues> = {
 export type Validate<TFieldValue> = (value: TFieldValue) => ValidateResult | Promise<ValidateResult>;
 
 // @public (undocumented)
-export type ValidateResult = Message | Message[] | boolean | undefined;
+export type ValidateResult = Message | boolean | undefined;
 
 // @public (undocumented)
 export type ValidationMode = {
diff --git a/src/types/validator.ts b/src/types/validator.ts
index d1a62067d31..741a09b66e8 100644
--- a/src/types/validator.ts
+++ b/src/types/validator.ts
@@ -15,7 +15,7 @@ export type ValidationValueMessage<
   message: Message;
 };
 
-export type ValidateResult = Message | Message[] | boolean | undefined;
+export type ValidateResult = Message | boolean | undefined;
 
 export type Validate<TFieldValue> = (
   value: TFieldValue,