diff --git a/vlib/v/gen/c/auto_str_methods.v b/vlib/v/gen/c/auto_str_methods.v
index 1324a45386..5c5698032f 100644
--- a/vlib/v/gen/c/auto_str_methods.v
+++ b/vlib/v/gen/c/auto_str_methods.v
@@ -905,7 +905,7 @@ fn (mut g Gen) gen_str_for_struct(info ast.Struct, styp string, typ_str string,
 		mut field_styp := sftyp.replace('*', '')
 		field_styp_fn_name := if sym_has_str_method {
 			mut field_fn_name := if ftyp_noshared.has_flag(.option) {
-				'${field_styp}_str'
+				g.get_str_fn(ftyp_noshared)
 			} else {
 				left_cc_type := g.cc_type(ftyp_noshared, false)
 				left_fn_name := util.no_dots(left_cc_type)
diff --git a/vlib/x/json2/README.md b/vlib/x/json2/README.md
index e22928f62c..a4841277cf 100644
--- a/vlib/x/json2/README.md
+++ b/vlib/x/json2/README.md
@@ -15,7 +15,7 @@ mut:
 	name     string
 	age      ?int = 20
 	birthday time.Time
-	deathday ?time.Time = none
+	deathday ?time.Time
 }
 
 fn main() {
@@ -39,11 +39,11 @@ mut:
 	name     string
 	age      ?int = 20
 	birthday time.Time
-	deathday ?time.Time = none
+	deathday ?time.Time
 }
 
 fn main() {
-	resp := '{"name": "Bob", "age": 20, "birthday": ${time.now()}}'
+	resp := '{"name": "Bob", "age": 20, "birthday": "${time.now()}"}'
 	person := json2.decode[Person](resp)!
 	/*
 	struct Person {
diff --git a/vlib/x/json2/json2.v b/vlib/x/json2/json2.v
index d082c1860d..0586a79ee5 100644
--- a/vlib/x/json2/json2.v
+++ b/vlib/x/json2/json2.v
@@ -52,19 +52,75 @@ pub fn decode[T](src string) !T {
 		} $else $if field.typ is i16 {
 			typ.$(field.name) = res[json_name]!.int()
 		} $else $if field.typ is i32 {
-			// typ.$(field.name) = res[field.name]!.i32()
+			typ.$(field.name) = i32(res[field.name]!.int())
 		} $else $if field.typ is i64 {
 			typ.$(field.name) = res[json_name]!.i64()
+		} $else $if field.typ is ?u8 {
+			if json_name in res {
+				typ.$(field.name) = ?u8(res[json_name]!.i64())
+			}
+		} $else $if field.typ is ?i8 {
+			if json_name in res {
+				typ.$(field.name) = ?i8(res[json_name]!.i64())
+			}
+		} $else $if field.typ is ?u16 {
+			if json_name in res {
+				typ.$(field.name) = ?u16(res[json_name]!.i64())
+			}
+		} $else $if field.typ is ?i16 {
+			if json_name in res {
+				typ.$(field.name) = ?i16(res[json_name]!.i64())
+			}
+		} $else $if field.typ is ?u32 {
+			if json_name in res {
+				typ.$(field.name) = ?u32(res[json_name]!.i64())
+			}
+		} $else $if field.typ is ?i32 {
+			if json_name in res {
+				typ.$(field.name) = ?i32(res[json_name]!.i64())
+			}
+		} $else $if field.typ is ?u64 {
+			if json_name in res {
+				typ.$(field.name) = ?u64(res[json_name]!.i64())
+			}
+		} $else $if field.typ is ?i64 {
+			if json_name in res {
+				typ.$(field.name) = ?i64(res[json_name]!.i64())
+			}
+		} $else $if field.typ is ?int {
+			if json_name in res {
+				typ.$(field.name) = ?int(res[json_name]!.i64())
+			}
 		} $else $if field.typ is f32 {
 			typ.$(field.name) = res[json_name]!.f32()
+		} $else $if field.typ is ?f32 {
+			if json_name in res {
+				typ.$(field.name) = res[json_name]!.f32()
+			}
 		} $else $if field.typ is f64 {
 			typ.$(field.name) = res[json_name]!.f64()
+		} $else $if field.typ is ?f64 {
+			if json_name in res {
+				typ.$(field.name) = res[json_name]!.f64()
+			}
 		} $else $if field.typ is bool {
 			typ.$(field.name) = res[json_name]!.bool()
+		} $else $if field.typ is ?bool {
+			if json_name in res {
+				typ.$(field.name) = res[json_name]!.bool()
+			}
 		} $else $if field.typ is string {
 			typ.$(field.name) = res[json_name]!.str()
+		} $else $if field.typ is ?string {
+			if json_name in res {
+				typ.$(field.name) = res[json_name]!.str()
+			}
 		} $else $if field.typ is time.Time {
 			typ.$(field.name) = res[field.name]!.to_time()!
+		} $else $if field.typ is ?time.Time {
+			if json_name in res {
+				typ.$(field.name) = res[field.name]!.to_time()!
+			}
 		} $else $if field.is_array {
 			// typ.$(field.name) = res[field.name]!.arr()
 		} $else $if field.is_struct {