diff --git a/configs/axs101_defconfig b/configs/axs101_defconfig
index a5436db..85a70c0 100644
--- a/configs/axs101_defconfig
+++ b/configs/axs101_defconfig
@@ -56,6 +56,7 @@
 CONFIG_DEBUG_UART_SHIFT=2
 CONFIG_DEBUG_UART_ANNOUNCE=y
 CONFIG_SYS_NS16550=y
+CONFIG_SYS_NS16550_MEM32=y
 CONFIG_SPI=y
 CONFIG_DM_SPI=y
 CONFIG_DESIGNWARE_SPI=y