diff --git a/vlib/json/json_test.v b/vlib/json/json_test.v
index 24b2584430..55c48830a1 100644
--- a/vlib/json/json_test.v
+++ b/vlib/json/json_test.v
@@ -3,18 +3,22 @@ import json
 struct Employee {
 	name string
 	age  int
+	salary f32
 }
 
 fn test_simple() {
-	x := Employee{'Peter', 28}
+	x := Employee{'Peter', 28, 95000.5}
 	s := json.encode(x)
-	assert s == '{"name":"Peter","age":28}'
+	eprintln('Employee x: $s')
+	assert s == '{"name":"Peter","age":28,"salary":95000.5}'
 	y := json.decode(Employee, s) or {
 		assert false
 		Employee{}
 	}
+	eprintln('Employee y: $y')
 	assert y.name == 'Peter'
 	assert y.age == 28
+	assert y.salary == 95000.5
 }
 
 struct User2 {
diff --git a/vlib/v/gen/json.v b/vlib/v/gen/json.v
index 522b27d6d4..9e35abd478 100644
--- a/vlib/v/gen/json.v
+++ b/vlib/v/gen/json.v
@@ -22,7 +22,7 @@ fn (mut g Gen) gen_json_for_type(typ table.Type) {
 	mut enc := strings.new_builder(100)
 	sym := g.table.get_type_symbol(typ)
 	styp := g.typ(typ)
-	if sym.name in ['int', 'string', 'bool'] {
+	if sym.name in ['int', 'string', 'bool', 'f32'] {
 		return
 	}
 	if sym.kind == .array {