diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 1c4a333..2ce336f 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -1,5 +1,6 @@
 CONFIG_SYS_TEXT_BASE=0
 CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_DEBUG_UART=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_ANDROID_BOOT_IMAGE=y
@@ -173,6 +174,7 @@
 CONFIG_DM_RESET=y
 CONFIG_SANDBOX_RESET=y
 CONFIG_DM_RTC=y
+CONFIG_DEBUG_UART_SANDBOX=y
 CONFIG_SANDBOX_SERIAL=y
 CONFIG_SMEM=y
 CONFIG_SANDBOX_SMEM=y