diff --git a/vlib/v/ast/ast.v b/vlib/v/ast/ast.v
index d6a69e9b39..95dfb04baf 100644
--- a/vlib/v/ast/ast.v
+++ b/vlib/v/ast/ast.v
@@ -654,9 +654,11 @@ pub:
 	has_val         bool
 	mod             string
 	len_expr        Expr
+	cap_expr        Expr
+	default_expr    Expr
 	has_len         bool
 	has_cap         bool
-	cap_expr        Expr
+	has_default     bool
 pub mut:
 	is_interface    bool // array of interfaces e.g. `[]Animal` `[Dog{}, Cat{}]`
 	interface_types []table.Type // [Dog, Cat]
diff --git a/vlib/v/fmt/fmt.v b/vlib/v/fmt/fmt.v
index b1bf96d7a7..c622d88ff7 100644
--- a/vlib/v/fmt/fmt.v
+++ b/vlib/v/fmt/fmt.v
@@ -970,18 +970,41 @@ fn (mut f Fmt) array_init(it ast.ArrayInit) {
 			}
 			f.write('map[${mk}]${mv}')
 			f.write('{')
+			if it.has_len {
+				f.write('len: ')
+				f.expr(it.len_expr)
+			}
 			if it.has_cap {
 				f.write('cap: ')
 				f.expr(it.cap_expr)
 			}
+			if it.has_default {
+				f.write('default: ')
+				f.expr(it.default_expr)
+			}
 			f.write('}')
 			return
 		}
 		f.write(f.type_to_str(it.typ))
 		f.write('{')
+		// TODO copypasta
+		if it.has_len {
+			f.write('len: ')
+			f.expr(it.len_expr)
+			if it.has_cap || it.has_default {
+				f.write(', ')
+			}
+		}
 		if it.has_cap {
 			f.write('cap: ')
 			f.expr(it.cap_expr)
+			if it.has_default {
+				f.write(', ')
+			}
+		}
+		if it.has_default {
+			f.write('default: ')
+			f.expr(it.default_expr)
 		}
 		f.write('}')
 		return
diff --git a/vlib/v/fmt/tests/array_newlines_keep.vv b/vlib/v/fmt/tests/array_newlines_keep.vv
index 0ce8e06f7f..93cd90a8ed 100644
--- a/vlib/v/fmt/tests/array_newlines_keep.vv
+++ b/vlib/v/fmt/tests/array_newlines_keep.vv
@@ -9,5 +9,6 @@ fn main() {
 		make_flag('darwin', '-framework', 'Cocoa'),
 		make_flag('windows', '-l', 'gdi32')
 	]
+	x := []int{len: 10, cap: 100, default: 1}
 	_ := expected_flags
 }
diff --git a/vlib/v/parser/containers.v b/vlib/v/parser/containers.v
index a8471979f2..7a7809bcbe 100644
--- a/vlib/v/parser/containers.v
+++ b/vlib/v/parser/containers.v
@@ -72,8 +72,10 @@ fn (mut p Parser) array_init() ast.ArrayInit {
 	}
 	mut has_len := false
 	mut has_cap := false
+	mut has_default := false
 	mut len_expr := ast.Expr{}
 	mut cap_expr := ast.Expr{}
+	mut default_expr := ast.Expr{}
 	if p.tok.kind == .lcbr && exprs.len == 0 {
 		// `[]int{ len: 10, cap: 100}` syntax
 		p.next()
@@ -90,7 +92,8 @@ fn (mut p Parser) array_init() ast.ArrayInit {
 					cap_expr = p.expr(0)
 				}
 				'default' {
-					p.expr(0)
+					has_default = true
+					default_expr = p.expr(0)
 				}
 				else {
 					p.error('wrong field `$key`, expecting `len`, `cap`, or `default`')
@@ -118,7 +121,9 @@ fn (mut p Parser) array_init() ast.ArrayInit {
 		has_len: has_len
 		len_expr: len_expr
 		has_cap: has_cap
+		has_default: has_default
 		cap_expr: cap_expr
+		default_expr: default_expr
 	}
 }