diff --git a/src/items/nullable.ts b/src/items/nullable.ts
index 2cb6cd8..9afbe46 100644
--- a/src/items/nullable.ts
+++ b/src/items/nullable.ts
@@ -17,7 +17,12 @@ export default class SchemaNullable<Type extends SchemaItem> extends SchemaItem<
 	}
 
 	public override parse(input: unknown, options?: { fast?: boolean }): ValidationResult<SchemaInfer<Type> | undefined> {
-		if (this.isNull(input)) {
+		const res = super.parse(input, options)
+		if (!res.valid) {
+			return res
+		}
+
+		if (this.isNull(res.object)) {
 			return {
 				valid: true,
 				object: undefined
@@ -28,7 +33,7 @@ export default class SchemaNullable<Type extends SchemaItem> extends SchemaItem<
 	}
 
 	public override isOfType(input: unknown): input is SchemaInfer<Type> | undefined {
-		return Array.isArray(input)
+		return this.isNull(input) || this.child.isOfType(input)
 	}
 
 	private isNull(value: unknown): value is undefined | null {