diff --git a/components/lib/textarea/Textarea.d.ts b/components/lib/textarea/Textarea.d.ts
index 24eee9126..d68e6bcd3 100755
--- a/components/lib/textarea/Textarea.d.ts
+++ b/components/lib/textarea/Textarea.d.ts
@@ -10,7 +10,7 @@
 import { TextareaHTMLAttributes } from 'vue';
 import { ComponentHooks } from '../basecomponent';
 import { PassThroughOptions } from '../passthrough';
-import { ClassComponent, GlobalComponentConstructor, PassThrough } from '../ts-helpers';
+import { ClassComponent, GlobalComponentConstructor, Nullable, PassThrough } from '../ts-helpers';
 
 export declare type TextareaPassThroughOptionType = TextareaPassThroughAttributes | ((options: TextareaPassThroughMethodOptions) => TextareaPassThroughAttributes | string) | string | null | undefined;
 
@@ -91,7 +91,7 @@ export interface TextareaProps extends TextareaHTMLAttributes {
     /**
      * Value of the component.
      */
-    modelValue?: string | undefined;
+    modelValue?: Nullable<string>;
     /**
      * When present, height of textarea changes as being typed.
      * @defaultValue false
diff --git a/doc/common/apidoc/index.json b/doc/common/apidoc/index.json
index 9854bbea8..7373c50af 100644
--- a/doc/common/apidoc/index.json
+++ b/doc/common/apidoc/index.json
@@ -51278,7 +51278,7 @@
                             "name": "modelValue",
                             "optional": true,
                             "readonly": false,
-                            "type": "string",
+                            "type": "Nullable<string>",
                             "default": "",
                             "description": "Value of the component."
                         },