diff --git a/vlib/json/json_test.v b/vlib/json/json_test.v
index c1e875b3b0..dee0c6bdd6 100644
--- a/vlib/json/json_test.v
+++ b/vlib/json/json_test.v
@@ -160,7 +160,7 @@ fn test_struct_in_struct() {
 
 fn test_encode_map() {
 	expected := '{"one":1,"two":2,"three":3,"four":4}'
-	numbers := {
+	numbers := map{
 		'one':   1
 		'two':   2
 		'three': 3
@@ -172,7 +172,7 @@ fn test_encode_map() {
 }
 
 fn test_parse_map() {
-	expected := {
+	expected := map{
 		'one':   1
 		'two':   2
 		'three': 3
@@ -180,7 +180,7 @@ fn test_parse_map() {
 	}
 	out := json.decode(map[string]int, '{"one":1,"two":2,"three":3,"four":4}') or {
 		assert false
-		r := {
+		r := map{
 			'': 0
 		}
 		r
@@ -201,18 +201,14 @@ fn test_nested_type() {
 		countries: [
 			Country{
 				name: 'UK'
-				cities: [City{'London'},
-					City{'Manchester'},
-				]
+				cities: [City{'London'}, City{'Manchester'}]
 			},
 			Country{
 				name: 'KU'
-				cities: [City{'Donlon'},
-					City{'Termanches'},
-				]
+				cities: [City{'Donlon'}, City{'Termanches'}]
 			},
 		]
-		users: {
+		users: map{
 			'Foo': User{
 				age: 10
 				nums: [1, 2, 3]
@@ -230,14 +226,14 @@ fn test_nested_type() {
 				pets: 'little boo'
 			}
 		}
-		extra: {
-			'2': {
+		extra: map{
+			'2': map{
 				'n1': 2
 				'n2': 4
 				'n3': 8
 				'n4': 16
 			}
-			'3': {
+			'3': map{
 				'n1': 3
 				'n2': 9
 				'n3': 27
@@ -379,3 +375,14 @@ fn test_decode_null_object() {
 	assert '$info.items' == '[]'
 	assert '$info.maps' == '{}'
 }
+
+struct Foo2 {
+	name string
+}
+
+fn test_pretty() {
+	foo := Foo2{'Bob'}
+	assert json.encode_pretty(foo) == '{
+	"name":	"Bob"
+}'
+}
diff --git a/vlib/v/gen/c/fn.v b/vlib/v/gen/c/fn.v
index 4a38a477a8..23505b273a 100644
--- a/vlib/v/gen/c/fn.v
+++ b/vlib/v/gen/c/fn.v
@@ -629,7 +629,7 @@ fn (mut g Gen) fn_call(node ast.CallExpr) {
 	is_json_encode := name == 'json.encode'
 	is_json_encode_pretty := name == 'json.encode_pretty'
 	is_json_decode := name == 'json.decode'
-	g.is_json_fn = is_json_encode || is_json_decode
+	g.is_json_fn = is_json_encode || is_json_encode_pretty || is_json_decode
 	mut json_type_str := ''
 	mut json_obj := ''
 	if g.is_json_fn {