diff --git a/samples/drivers/dac/boards/gd32a503v_eval.overlay b/samples/drivers/dac/boards/gd32a503v_eval.overlay
new file mode 100644
index 00000000000..062ee89d042
--- /dev/null
+++ b/samples/drivers/dac/boards/gd32a503v_eval.overlay
@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2022 YuLong Yao <feilongphone@gmail.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	zephyr,user {
+		dac = <&dac>;
+		dac-channel-id = <0>;
+		dac-resolution = <12>;
+	};
+};