diff --git a/src/model/model-to-valibot.ts b/src/model/model-to-valibot.ts
index 1add416..256d1da 100644
--- a/src/model/model-to-valibot.ts
+++ b/src/model/model-to-valibot.ts
@@ -81,7 +81,15 @@ export namespace ModelToValibot {
     return UnsupportedType(schema)
   }
   function Function(schema: Types.TFunction) {
-    return UnsupportedType(schema)
+    const constraints: string[] = []
+    if (schema.parameters !== undefined) {
+    const items = schema.parameters.map((schema) => Visit(schema)).join(`, `)
+      constraints.push(`v.args(${Type(`v.tuple`, `[${items}]`, [])})`)
+    }
+    if (schema.returns !== undefined ) {
+      constraints.push(`v.returns(${Visit(schema.returns)})`)
+    }
+    return Type(`v.function`, null, constraints)
   }
   function Integer(schema: Types.TInteger) {
     return Type(`v.number`, null, [`v.integer()`])