diff --git a/configs/thuban_defconfig b/configs/thuban_defconfig
index eb7e285..3fccaf1 100644
--- a/configs/thuban_defconfig
+++ b/configs/thuban_defconfig
@@ -24,6 +24,7 @@
 CONFIG_SPL=y
 CONFIG_SPL_I2C_SUPPORT=y
 CONFIG_SPL_YMODEM_SUPPORT=y
+# CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC is not set
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="U-Boot# "
 CONFIG_AUTOBOOT_KEYED=y