diff --git a/tutorials/building_a_simple_web_blog_with_vweb/code/blog/blog.v b/tutorials/building_a_simple_web_blog_with_vweb/code/blog/blog.v
index fa96c19afe..00b379abbe 100644
--- a/tutorials/building_a_simple_web_blog_with_vweb/code/blog/blog.v
+++ b/tutorials/building_a_simple_web_blog_with_vweb/code/blog/blog.v
@@ -7,13 +7,13 @@ import json
 
 struct App {
 	vweb.Context
-mut:
+pub mut:
 	db      sqlite.DB [server_var]
 	user_id string
 }
 
 fn main() {
-	vweb.run<App>(8081)
+	vweb.run(&App{}, 8081)
 }
 
 /*
diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index 5ee6b954af..a75e2ce461 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -5749,11 +5749,13 @@ pub fn (mut c Checker) if_expr(mut node ast.IfExpr) ast.Type {
 						comptime_field_name = left.expr.str()
 						c.comptime_fields_type[comptime_field_name] = got_type
 						is_comptime_type_is_expr = true
-					} else if branch.cond.right is ast.TypeNode && left is ast.TypeNode {
+					} else if branch.cond.right is ast.TypeNode && left is ast.TypeNode
+						&& sym.kind == .interface_ {
 						// is interface
 						checked_type := c.unwrap_generic((left as ast.TypeNode).typ)
 						should_skip = !c.table.type_implements_interface(checked_type,
 							got_type)
+						eprintln('> checked_type: $checked_type | got_type: $got_type | should_skip: $should_skip')
 					} else if left is ast.TypeNode {
 						is_comptime_type_is_expr = true
 						left_type := c.unwrap_generic(left.typ)
diff --git a/vlib/vweb/vweb_app_test.v b/vlib/vweb/vweb_app_test.v
new file mode 100644
index 0000000000..0ebfa6ed80
--- /dev/null
+++ b/vlib/vweb/vweb_app_test.v
@@ -0,0 +1,63 @@
+module main
+
+import vweb
+import time
+import sqlite
+
+struct App {
+	vweb.Context
+pub mut:
+	db      sqlite.DB [server_var]
+	user_id string
+}
+
+struct Article {
+	id    int
+	title string
+	text  string
+}
+
+fn test_a_vweb_application_compiles() {
+	go fn() {
+		time.sleep(2 * time.second)
+		exit(0)
+	}()
+	vweb.run(&App{}, 18081)
+}
+
+pub fn (mut app App) init_server() {
+	app.db = sqlite.connect('blog.db') or { panic(err) }
+	app.db.create_table('article', [
+		'id integer primary key',
+		"title text default ''",
+		"text text default ''",
+	])
+}
+
+pub fn (mut app App) before_request() {
+	app.user_id = app.get_cookie('id') or { '0' }
+}
+
+['/new_article'; post]
+pub fn (mut app App) new_article() vweb.Result {
+	title := app.form['title']
+	text := app.form['text']
+	if title == '' || text == '' {
+		return app.text('Empty text/title')
+	}
+	article := Article{
+		title: title
+		text: text
+	}
+	println('posting article')
+	println(article)
+	sql app.db {
+		insert article into Article
+	}
+
+	return app.redirect('/')
+}
+
+fn (mut app App) time() {
+	app.text(time.now().format())
+}