diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index dfca62f9fc..1feb19a7d6 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -217,6 +217,7 @@ pub fn (c mut Checker) call_expr(call_expr mut ast.CallExpr) table.Type {
 	}
 	// println can print anything
 	if fn_name == 'println' {
+		c.expr(call_expr.args[0])
 		return f.return_type
 	}
 	for i, arg_expr in call_expr.args {
diff --git a/vlib/v/gen/cgen.v b/vlib/v/gen/cgen.v
index 8eb9ae0cb2..2f5f26119d 100644
--- a/vlib/v/gen/cgen.v
+++ b/vlib/v/gen/cgen.v
@@ -484,6 +484,7 @@ fn (g mut Gen) expr(node ast.Expr) {
 				g.expr(it.left)
 				g.write(', ')
 				g.expr(it.right)
+				g.write(')')
 			}
 			else {
 				// if it.op == .dot {
diff --git a/vlib/v/gen/tests/1.c b/vlib/v/gen/tests/1.c
index 825c9a99c5..850b3cc2db 100644
--- a/vlib/v/gen/tests/1.c
+++ b/vlib/v/gen/tests/1.c
@@ -89,7 +89,7 @@ i < 10; i++) {
 	bool b3 = get_bool() || true;
 	int f = array_int_first(nums);
 	string d = tos3("d");
-	println(string_add(s + d));
+	println(string_add(s, d));
 }
 
 void User_inc_age(User u, int n) {