diff --git a/api-reference/10 UI Components/dxValidator/8 Validation Rules/CustomRule/validationCallback.md b/api-reference/10 UI Components/dxValidator/8 Validation Rules/CustomRule/validationCallback.md
index 95b9fdc7ff..043f97a091 100644
--- a/api-reference/10 UI Components/dxValidator/8 Validation Rules/CustomRule/validationCallback.md	
+++ b/api-reference/10 UI Components/dxValidator/8 Validation Rules/CustomRule/validationCallback.md	
@@ -24,7 +24,7 @@ The rule being checked.
 ##### field(options.validator): Object
 The [Validator](/api-reference/10%20UI%20Components/dxValidator '/Documentation/ApiReference/UI_Components/dxValidator') object that initiated the validation.
 
-##### field(options.value): any
+##### field(options.value): String | Number
 The validated value. Note that the value type depends on the validated editor.
 
 ##### return: Boolean