diff --git a/drivers/gnss/serial.h b/drivers/gnss/serial.h
index 980ffdc86c2a..621953f7821d 100644
--- a/drivers/gnss/serial.h
+++ b/drivers/gnss/serial.h
@@ -16,7 +16,7 @@ struct gnss_serial {
 	struct gnss_device *gdev;
 	speed_t	speed;
 	const struct gnss_serial_ops *ops;
-	unsigned long drvdata[0];
+	unsigned long drvdata[];
 };
 
 enum gnss_serial_pm_state {