1 files changed, 5 insertions, 3 deletions
diff --git a/include/serial.h b/include/serial.h
index d7a9a8cfb8b..e5f6d984d28 100644
--- a/include/serial.h
+++ b/include/serial.h
@@ -299,9 +299,11 @@ struct dm_serial_ops {
 struct serial_dev_priv {
 	struct stdio_dev *sdev;
 
-	char *buf;
-	int rd_ptr;
-	int wr_ptr;
+#if CONFIG_IS_ENABLED(SERIAL_RX_BUFFER)
+	char buf[CONFIG_SERIAL_RX_BUFFER_SIZE];
+	uint rd_ptr;
+	uint wr_ptr;
+#endif
 };
 
 /* Access the serial operations for a device */