diff --git a/vlib/builtin/array_test.v b/vlib/builtin/array_test.v
index 8cc0da76cd..7f94c36a75 100644
--- a/vlib/builtin/array_test.v
+++ b/vlib/builtin/array_test.v
@@ -542,3 +542,17 @@ fn test_for_last() {
 	assert s == '[1, 2, 3, 4]'
 }
 */
+
+struct Foo {
+	mut:
+	bar []int
+}
+
+fn test_in_struct() {
+	mut baz := Foo{
+		bar: [0, 0, 0]
+	}
+	baz.bar[0] += 2
+	baz.bar[0]++
+	assert baz.bar[0] == 3
+}
diff --git a/vlib/compiler/parser.v b/vlib/compiler/parser.v
index 7afd30acf4..6c54279682 100644
--- a/vlib/compiler/parser.v
+++ b/vlib/compiler/parser.v
@@ -1964,7 +1964,7 @@ fn (p mut Parser) var_expr(v Var) string {
 		// p.print_tok()
 		// dc++
 		if p.tok == .lsbr {
-			// typ = p.index_expr(typ, fn_ph, v)
+			typ = p.index_expr(typ, fn_ph)
 		}
 	}
 	// `a++` and `a--`