src/traits/ZodSchemaObject.ts

@@ -41,7 +41,7 @@ export const ZodSchemaObject = <
             }
 
             static pipeInstanceIntoSchema<
-                Instance          extends Values,
+                Self              extends Class<Values, [values: Values]>,
 
                 SchemaT           extends z.ZodRawShape,
                 SchemaUnknownKeys extends z.UnknownKeysParam,
@@ -49,14 +49,10 @@ export const ZodSchemaObject = <
                 SchemaOutput,
                 SchemaInput       extends Values,
             >(
-                this: (
-                    Class<Instance, [values: Values]> &
-                    ImplStatic<typeof ZodSchemaObjectImpl>
-                ),
-
-                schema: z.ZodObject<SchemaT, SchemaUnknownKeys, SchemaCatchall, SchemaOutput, SchemaInput>,
+                this:    Self,
+                schema:  z.ZodObject<SchemaT, SchemaUnknownKeys, SchemaCatchall, SchemaOutput, SchemaInput>,
             ) {
-                return schema.transform(values => new this(values))
+                return z.instanceof(this).pipe(schema)
             }